Make sure that the documentation on the website is that of the last release

[bclement-ocp]

Not of unreleased code ;)

[Halbaroth]

The current workflow is as follow: There is a branch gh-pages and a GitHub action in documentation.yml that build and push the documentation from next to the branch gh-pages as soon as we push on next.

The branch main is not up to date. We should push the branch 2.4.x on it and modify the GitHub action in order to use this branch as reference for the documentation.

[bclement-ocp]

(Taking over this one)