Missing documentation build for versions 2.7.1 and 2.6.2 
After the patch releases [2.7.1](https://github.com/huggingface/datasets/releases/tag/2.7.1) and [2.6.2](https://github.com/huggingface/datasets/releases/tag/2.6.2), the online docs were not properly built (the build_documentation workflow was not triggered).

There was a fix by:
- #5291

However, both documentations were built from main branch, instead of their corresponding version branch.

We are rebuilding them.