Translate accelerate.mdx from english to spanish
Author: Sangohe
Pull request: yes

# What does this PR do?

Add the spanish version of [`accelerate.mdx`](https://github.com/huggingface/transformers/blob/master/docs/source/accelerate.mdx) to [`transformers/docs/source_es`](https://github.com/huggingface/transformers/tree/master/docs/source_es)

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Fixes https://github.com/huggingface/transformers/issues/15947 (issue)


## Before submitting
- [x] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
- [x] Did you read the [contributor guideline](https://github.com/huggingface/transformers/blob/master/CONTRIBUTING.md#start-contributing-pull-requests),
      Pull Request section?


## Who can review?
@omarespejel @osanseviero 

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Models:

- albert, bert, xlm: @LysandreJik
- blenderbot, bart, marian, pegasus, encoderdecoder,  t5: @patrickvonplaten, @patil-suraj
- longformer, reformer, transfoxl, xlnet: @patrickvonplaten
- fsmt: @stas00
- funnel: @sgugger
- gpt2: @patrickvonplaten, @LysandreJik
- rag: @patrickvonplaten, @lhoestq
- tensorflow: @LysandreJik

Library:

- benchmarks: @patrickvonplaten
- deepspeed: @stas00
- ray/raytune: @richardliaw, @amogkam
- text generation: @patrickvonplaten
- tokenizers: @n1t0, @LysandreJik
- trainer: @sgugger
- pipelines: @LysandreJik

Documentation: @sgugger

HF projects:

- datasets: [different repo](https://github.com/huggingface/datasets)
- rust tokenizers: [different repo](https://github.com/huggingface/tokenizers)

Examples:

- maintained examples (not research project or legacy): @sgugger, @patil-suraj
- research_projects/bert-loses-patience: @JetRunner
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Comments:
_The documentation is not available anymore as the PR was closed or merged._

Thanks, @Sangohe! I will review it during the week :)

> Muchas gracias! I left some simple comments.

Thank you for your comments. I've added all the suggestions and committed the new version

Thanks again for the review. I've committed the last suggestions.

Thank you @Sangohe! 🤗

@sgugger LGTM 👍