Website navigation bar links are broken from examples/docs sections

[sharpsy]

Description of the problem

Website navigation bar links are broken from examples/docs sections. Once Examples, Learn, or API sections are visited, the rest of the navigation bar hyperlinks lead to "Page not found" or "The page isn’t redirecting properly".

Please provide a minimal, self-contained, and reproducible steps.

1. Visit the PyMC homepage (https://www.pymc.io/)
2. Click on the any of 'Examples', 'Learn', or 'API' links in the top navigation bar.
   for example: https://www.pymc.io/projects/examples/en/latest/gallery.html)
3. Click on 'Home', 'Community', or 'Contributing' links in the top navigation bar.
   examples of linked location:
   https://www.pymc.io/projects/examples/en/latest/https%3A//www.pymc.io.html
   https://www.pymc.io/projects/docs/en/stable/https%3A//www.pymc.io/welcome.html.html)
4. Observe the 'Page nor found' or 'The page isn't redirecting properly'

[OriolAbril]

All of this is already fixed (except for 4.2 and maybe the 4.1 version slugs). It was fixed by pymc-devs/pymc.io#57, #6296 (plus the release to get the changes from latest to stable, the default), pymc-devs/pymc-examples#465