docs: add reference Git over SSH

see https://discuss.huggingface.co/t/update-datasets-getting-started-to-new-git-security/65893

Comments:
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_6499). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

<details>
<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.005701 / 0.011353 (-0.005652) | 0.003546 / 0.011008 (-0.007463) | 0.063335 / 0.038508 (0.024827) | 0.051987 / 0.023109 (0.028878) | 0.240429 / 0.275898 (-0.035469) | 0.260659 / 0.323480 (-0.062820) | 0.003866 / 0.007986 (-0.004120) | 0.002617 / 0.004328 (-0.001712) | 0.048653 / 0.004250 (0.044403) | 0.038176 / 0.037052 (0.001124) | 0.245496 / 0.258489 (-0.012993) | 0.277141 / 0.293841 (-0.016700) | 0.027886 / 0.128546 (-0.100660) | 0.010738 / 0.075646 (-0.064908) | 0.211255 / 0.419271 (-0.208016) | 0.045205 / 0.043533 (0.001672) | 0.243062 / 0.255139 (-0.012077) | 0.262877 / 0.283200 (-0.020323) | 0.023426 / 0.141683 (-0.118257) | 1.092247 / 1.452155 (-0.359908) | 1.161074 / 1.492716 (-0.331642) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.090488 / 0.018006 (0.072482) | 0.300993 / 0.000490 (0.300504) | 0.000212 / 0.000200 (0.000012) | 0.000044 / 0.000054 (-0.000011) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.018543 / 0.037411 (-0.018868) | 0.061418 / 0.014526 (0.046892) | 0.073242 / 0.176557 (-0.103314) | 0.120757 / 0.737135 (-0.616378) | 0.073967 / 0.296338 (-0.222372) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.282341 / 0.215209 (0.067132) | 2.741106 / 2.077655 (0.663451) | 1.416573 / 1.504120 (-0.087547) | 1.287904 / 1.541195 (-0.253291) | 1.309425 / 1.468490 (-0.159065) | 0.582592 / 4.584777 (-4.002184) | 2.404866 / 3.745712 (-1.340846) | 2.895397 / 5.269862 (-2.374464) | 1.799864 / 4.565676 (-2.765812) | 0.064386 / 0.424275 (-0.359889) | 0.004920 / 0.007607 (-0.002687) | 0.330879 / 0.226044 (0.104835) | 3.287064 / 2.268929 (1.018135) | 1.765169 / 55.444624 (-53.679456) | 1.490442 / 6.876477 (-5.386034) | 1.530960 / 2.142072 (-0.611113) | 0.655939 / 4.805227 (-4.149288) | 0.118529 / 6.500664 (-6.382135) | 0.042350 / 0.075469 (-0.033119) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.959027 / 1.841788 (-0.882761) | 11.911284 / 8.074308 (3.836976) | 10.576898 / 10.191392 (0.385506) | 0.141038 / 0.680424 (-0.539386) | 0.014184 / 0.534201 (-0.520017) | 0.305335 / 0.579283 (-0.273948) | 0.267531 / 0.434364 (-0.166832) | 0.353362 / 0.540337 (-0.186975) | 0.466258 / 1.386936 (-0.920678) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.005194 / 0.011353 (-0.006159) | 0.003561 / 0.011008 (-0.007448) | 0.049181 / 0.038508 (0.010673) | 0.056664 / 0.023109 (0.033555) | 0.267142 / 0.275898 (-0.008756) | 0.291871 / 0.323480 (-0.031609) | 0.003996 / 0.007986 (-0.003990) | 0.003147 / 0.004328 (-0.001181) | 0.048527 / 0.004250 (0.044276) | 0.040239 / 0.037052 (0.003187) | 0.269728 / 0.258489 (0.011239) | 0.295531 / 0.293841 (0.001690) | 0.030316 / 0.128546 (-0.098231) | 0.010666 / 0.075646 (-0.064981) | 0.058176 / 0.419271 (-0.361095) | 0.033218 / 0.043533 (-0.010315) | 0.265383 / 0.255139 (0.010244) | 0.285102 / 0.283200 (0.001902) | 0.018295 / 0.141683 (-0.123388) | 1.117830 / 1.452155 (-0.334325) | 1.196919 / 1.492716 (-0.295798) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.088547 / 0.018006 (0.070541) | 0.293220 / 0.000490 (0.292730) | 0.000211 / 0.000200 (0.000011) | 0.000043 / 0.000054 (-0.000012) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.022060 / 0.037411 (-0.015351) | 0.071973 / 0.014526 (0.057448) | 0.081721 / 0.176557 (-0.094836) | 0.119990 / 0.737135 (-0.617145) | 0.081639 / 0.296338 (-0.214700) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.293712 / 0.215209 (0.078503) | 2.872986 / 2.077655 (0.795331) | 1.568944 / 1.504120 (0.064824) | 1.434555 / 1.541195 (-0.106639) | 1.457747 / 1.468490 (-0.010743) | 0.559296 / 4.584777 (-4.025481) | 2.471845 / 3.745712 (-1.273867) | 2.840916 / 5.269862 (-2.428946) | 1.754909 / 4.565676 (-2.810768) | 0.064585 / 0.424275 (-0.359690) | 0.004992 / 0.007607 (-0.002615) | 0.349149 / 0.226044 (0.123104) | 3.385906 / 2.268929 (1.116977) | 1.940644 / 55.444624 (-53.503980) | 1.638300 / 6.876477 (-5.238177) | 1.649939 / 2.142072 (-0.492133) | 0.645680 / 4.805227 (-4.159547) | 0.118080 / 6.500664 (-6.382584) | 0.040643 / 0.075469 (-0.034826) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.969965 / 1.841788 (-0.871822) | 12.099766 / 8.074308 (4.025457) | 10.550650 / 10.191392 (0.359258) | 0.131736 / 0.680424 (-0.548688) | 0.015483 / 0.534201 (-0.518718) | 0.289231 / 0.579283 (-0.290052) | 0.287505 / 0.434364 (-0.146858) | 0.327326 / 0.540337 (-0.213011) | 0.570364 / 1.386936 (-0.816572) |

</details>
</details>

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