Test against python 3.12 final.

[joaander]

Description

Test against the Python 3.12 final release.

Motivation and Context

Ensure that gsd works correctly with Python 3.12. The 2023.09.26 image contains a Python 3.12 release candidate while the 2023.10.09 contains Python 3.12.0.

How Has This Been Tested?

CI checks.

Checklist:

• [x] I have reviewed the Contributor Guidelines.
• [x] I agree with the terms of the GSD Contributor Agreement.
• [x] My name is on the list of contributors (doc/credits.rst) in the pull request source branch.