changed the pydata-sphinx-theme dependency to the git version

[louisjh14]

• closes #xxxx (Replace xxxx with the GitHub issue number)
• Tests added and passed if fixing a bug or adding a new feature
• All code checks passed.
• Added type annotations to new arguments/methods/functions.
• Added an entry in the latest doc/source/whatsnew/vX.X.X.rst file if fixing a bug or adding a new feature.

[datapythonista]

This seems a bad idea. And if you think we should be doing this, please open an issue with the motivation, or at least write a description in the PR, so this can be discussed. But we don't want changes to a sphinx theme breaking our CI, so I don't think we'll get this merged.

[louisjh14]

This was related to issue #51536. This is my first time, I must off misunderstood what he was looking for.

[datapythonista]

Thanks for the information. The first line in the template is to provide the issue you are addressing, so we have more context.

I opened that issue, and there is indeed some misunderstanding. I think we are probably using a version that supports the footer now, you'll have to check. But the issue is about simplifying the footer. Maybe we need to upgrade the sphinx theme, but that would be to a specific version.

I can reopen this PR if needed, but probably better to start in a new branch. Juat let me know if you reuse this branch so I can reopen here.