Doc build bug?
Author: mishig25
Pull request: yes

# What does this PR do?

If you compare doc-build [transformers](https://github.com/huggingface/doc-build/tree/main/transformers/master/en) vs [datasets](https://github.com/huggingface/doc-build/tree/main/datasets/master/en), you see that transformers master version files are NOT being overwritten. (the should be overwritten).

| tsfms | dtsts |
|-------|-------|
| <img width="1374" alt="Screenshot 2022-03-09 at 16 16 49" src="https://user-images.githubusercontent.com/11827707/157473832-8726ce0f-1ddd-4e6b-9052-20365f3fbb76.png">   | <img width="1477" alt="Screenshot 2022-03-09 at 16 18 19" src="https://user-images.githubusercontent.com/11827707/157473852-6b7294f4-db09-4c54-900b-0a27a7e349ec.png">   |




When I compared build_documentation.yml between [tsfms](https://github.com/huggingface/transformers/blob/master/.github%2Fworkflows%2Fbuild_documentation.yml#L100) & [datasets](https://github.com/huggingface/datasets/blob/master/.github%2Fworkflows%2Fbuild_documentation.yml#L72-L79), I see
diff 
```
git stash && git pull && git stash apply &&
```

I don't see https://github.com/huggingface/doc-builder/pull/131 being applied when I go to https://huggingface.co/docs/transformers/master/en/model_doc/bert

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Fixes # (issue)


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Models:

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Comments:
Removing this line will cause an error each time the doc-build repo has been updated by another commit for another library.

The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_16019). All of your documentation changes will be reflected on that endpoint.

Ugh, it does look like it prevents any update though, which is weird.

I see
However, in this img https://user-images.githubusercontent.com/11827707/157473832-8726ce0f-1ddd-4e6b-9052-20365f3fbb76.png

everything except _toctree.yml should say `updated 6 mins ago` because they should have been part of the new build (in each build [this section](https://github.com/huggingface/doc-build/blob/main/transformers/master/en/accelerate.html#L2-L10) of every .html file changes)