Update doc build to py313

[opotowsky]

What is the change?

The docs are being built with python 3.9. This updates them to python 3.13 (updating dependency pins in the process)

Why is the change being made?

Keepin' up with the times!

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Checklist

• This PR has only one purpose or idea.
• Tests have been added/updated to verify any new/changed code.

• The code style follows good practices.
• The commit message(s) follow good practices.

• The release notes have been updated if necessary.
• The documentation is still up-to-date in the doc folder.
• The dependencies are still up-to-date in pyproject.toml.

[opotowsky]

I'm really not sure why the usermethod no longer shows up in locals.

I just tried globals on a whim and it was there. Is this dangerous?

[ntouran]

was just talking to @john-science about the nbextensions. That's from back when we had an awesome dockerized jupyterhub instance of ARMI with all plugins. It added a few neat tools that some users liked. It's totally fine to remove it now since we don't know of anyone using them in jupyterhub at the moment.