Doc is broken everywhere because we now need .readthedocs.yaml
See:
- https://blog.readthedocs.com/migrate-configuration-v2/
- https://docs.readthedocs.io/en/stable/config-file/index.html
- https://docs.readthedocs.io/en/stable/config-file/v2.html
And I've fixed it on logilab-common here: https://forge.extranet.logilab.fr/open-source/logilab-common/-/commit/65b71690408674e077bb98dd799e69282e9b89e8