Temporarily pin fsspec

Fix #5730.

Comments:
_The documentation is not available anymore as the PR was closed or merged._

<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) | 0.009735 / 0.011353 (-0.001618) | 0.010410 / 0.011008 (-0.000598) | 0.134986 / 0.038508 (0.096478) | 0.038392 / 0.023109 (0.015283) | 0.414451 / 0.275898 (0.138553) | 0.447775 / 0.323480 (0.124295) | 0.007223 / 0.007986 (-0.000763) | 0.006373 / 0.004328 (0.002045) | 0.102631 / 0.004250 (0.098381) | 0.048516 / 0.037052 (0.011464) | 0.410179 / 0.258489 (0.151690) | 0.467773 / 0.293841 (0.173932) | 0.053163 / 0.128546 (-0.075384) | 0.019801 / 0.075646 (-0.055845) | 0.452708 / 0.419271 (0.033436) | 0.068691 / 0.043533 (0.025159) | 0.405482 / 0.255139 (0.150343) | 0.457669 / 0.283200 (0.174470) | 0.113464 / 0.141683 (-0.028219) | 1.918143 / 1.452155 (0.465988) | 2.033123 / 1.492716 (0.540407) |

### 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) | 0.274564 / 0.018006 (0.256557) | 0.608855 / 0.000490 (0.608366) | 0.006266 / 0.000200 (0.006066) | 0.000105 / 0.000054 (0.000050) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.033704 / 0.037411 (-0.003708) | 0.130982 / 0.014526 (0.116456) | 0.143862 / 0.176557 (-0.032694) | 0.212622 / 0.737135 (-0.524513) | 0.148899 / 0.296338 (-0.147439) |

### 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) | 0.670968 / 0.215209 (0.455759) | 6.602911 / 2.077655 (4.525256) | 2.644290 / 1.504120 (1.140171) | 2.268593 / 1.541195 (0.727399) | 2.325393 / 1.468490 (0.856903) | 1.388156 / 4.584777 (-3.196621) | 5.958569 / 3.745712 (2.212857) | 3.310756 / 5.269862 (-1.959106) | 2.390953 / 4.565676 (-2.174724) | 0.147416 / 0.424275 (-0.276859) | 0.015201 / 0.007607 (0.007594) | 0.794109 / 0.226044 (0.568064) | 7.984855 / 2.268929 (5.715926) | 3.382275 / 55.444624 (-52.062349) | 2.676102 / 6.876477 (-4.200375) | 2.846743 / 2.142072 (0.704671) | 1.467523 / 4.805227 (-3.337704) | 0.283184 / 6.500664 (-6.217480) | 0.088655 / 0.075469 (0.013186) |

### 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) | 1.632765 / 1.841788 (-0.209022) | 19.102473 / 8.074308 (11.028165) | 25.632535 / 10.191392 (15.441143) | 0.255628 / 0.680424 (-0.424795) | 0.034655 / 0.534201 (-0.499546) | 0.564593 / 0.579283 (-0.014690) | 0.668339 / 0.434364 (0.233975) | 0.648414 / 0.540337 (0.108076) | 0.766735 / 1.386936 (-0.620201) |

</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) | 0.009658 / 0.011353 (-0.001695) | 0.006690 / 0.011008 (-0.004318) | 0.099151 / 0.038508 (0.060643) | 0.037092 / 0.023109 (0.013983) | 0.470354 / 0.275898 (0.194456) | 0.525863 / 0.323480 (0.202383) | 0.007593 / 0.007986 (-0.000393) | 0.006637 / 0.004328 (0.002308) | 0.098782 / 0.004250 (0.094532) | 0.058524 / 0.037052 (0.021471) | 0.502569 / 0.258489 (0.244080) | 0.526410 / 0.293841 (0.232569) | 0.059486 / 0.128546 (-0.069060) | 0.019742 / 0.075646 (-0.055904) | 0.119715 / 0.419271 (-0.299556) | 0.065269 / 0.043533 (0.021736) | 0.483327 / 0.255139 (0.228188) | 0.506148 / 0.283200 (0.222948) | 0.123178 / 0.141683 (-0.018505) | 1.916624 / 1.452155 (0.464470) | 2.051410 / 1.492716 (0.558694) |

### 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) | 0.286481 / 0.018006 (0.268475) | 0.597300 / 0.000490 (0.596810) | 0.008906 / 0.000200 (0.008706) | 0.000128 / 0.000054 (0.000074) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.031406 / 0.037411 (-0.006005) | 0.146748 / 0.014526 (0.132222) | 0.152898 / 0.176557 (-0.023658) | 0.212535 / 0.737135 (-0.524600) | 0.155577 / 0.296338 (-0.140761) |

### 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) | 0.660989 / 0.215209 (0.445780) | 6.688530 / 2.077655 (4.610875) | 3.039278 / 1.504120 (1.535159) | 2.660357 / 1.541195 (1.119162) | 2.696912 / 1.468490 (1.228422) | 1.259760 / 4.584777 (-3.325017) | 5.922452 / 3.745712 (2.176740) | 5.304200 / 5.269862 (0.034338) | 2.823928 / 4.565676 (-1.741748) | 0.148118 / 0.424275 (-0.276157) | 0.015575 / 0.007607 (0.007968) | 0.794404 / 0.226044 (0.568360) | 8.233651 / 2.268929 (5.964722) | 3.777482 / 55.444624 (-51.667142) | 3.064924 / 6.876477 (-3.811552) | 3.117803 / 2.142072 (0.975731) | 1.479559 / 4.805227 (-3.325668) | 0.254070 / 6.500664 (-6.246594) | 0.086806 / 0.075469 (0.011337) |

### 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) | 1.735515 / 1.841788 (-0.106273) | 18.934157 / 8.074308 (10.859848) | 22.645248 / 10.191392 (12.453856) | 0.227073 / 0.680424 (-0.453351) | 0.030650 / 0.534201 (-0.503551) | 0.594619 / 0.579283 (0.015336) | 0.653304 / 0.434364 (0.218940) | 0.707484 / 0.540337 (0.167147) | 0.823327 / 1.386936 (-0.563610) |

</details>
</details>

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