Docs are not generated after latest release
After the latest `datasets` release version 0.7.0, the docs were not generated.

As we have changed the release procedure (so that now we do not push directly to main branch), maybe we should also change the corresponding GitHub action:

https://github.com/huggingface/datasets/blob/edf1902f954c5568daadebcd8754bdad44b02a85/.github/workflows/build_documentation.yml#L3-L8

Related to:
- #5250

CC: @mishig25 