chore: add python 3.12 support

[BryanttV]

Description

This PR adds support to Python 3.12

Supporting information

• Drop Python 3.8 & Add Support for Python 3.12 #393
• Drop Python 3.8 & add support for Python 3.12 public-engineering#274

Checklists

Check off if complete or not applicable:

Merge Checklist:

• All reviewers approved
• Reviewer tested the code following the testing instructions
• CI build is green
• Version bumped
• Changelog record added with short description of the change and current date
• Documentation updated (not only docstrings)
• Code dependencies reviewed
• Fixup commits are squashed away
• Unit tests added/updated
• Noted any: Concerns, dependencies, migration issues, deadlines, tickets

Post Merge:

• Create a tag
• Create a release on GitHub
• Check new version is pushed to PyPI after tag-triggered build is
  finished.
• Delete working branch (if not needed anymore)
• Upgrade the package in the Open edX platform requirements (if applicable)

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[mariajgrimaldi]

What do you think about this being a chore instead, given that we're mainly adding additional checks for maintenance?

[BryanttV]

Hi @mariajgrimaldi, yes, chore is better in this case. I updated the title.

[mariajgrimaldi]

LGTM! Thanks for addressing all of my comments. Can you update the changelog and the __init__ file considering the chore change?