Adapt `docs/README.md` for datasets
MEMBER
Thanks for reporting @qqaatw.

Yes, we should definitely adapt that file for `datasets`. 
2022-03-21T08:54:00Z
https://github.com/huggingface/datasets/issues/3977#issuecomment-1073646909
https://api.github.com/repos/huggingface/datasets/issues/3977
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2022-03-21T08:54:00Z
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## Describe the bug

Currently `docs/README.md` is a direct copy from `transformers`, we should probably adapt this file for `datasets`.