docs: mark some redirects as allowed

docs: mark some redirects as allowed

These redirects are all fine. I don't think we want to apply them,
because they are more about implementation details on the target site.

So let's just mark them as OK. They cause no harm.

There's also some redirects that are all about authentication. We also
don't want to apply these, because they would break the links.

Reviewed-by: Corentin Noël <corentin.noel@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25585>