Docs: navigation issues with dropdown menus of EOL versions

[logangamesdaily]

Documentation

When visiting the Python documentation page for 3.10 or 3.8 (and possibly others), you cannot switch versions to any other python version from the dropdown, at all, it just redirects back to where you came from.

[picnixz]

Oh, that's a very intringuing issue! Thanks for the report. We're also not consistent: some versions have access to other versions, but not all of them do. Maybe we should do something for the dropdown menu so that it's independent of the Python version (except for the version it should render by default?)

cc @hugovk @AA-Turner