Fix pygit2 deprecations

[No767]

Summary

Around an week ago, pygit2 released 1.15.0, which included plenty of deprecations and breaking changes. One of them namely is the removal of oid.hex, which of course, caused an issue with pyright and thus resulting to this PR.

pre-commit also now uses Python 3.12 as the default, as most people working on this project should be using this version.

Types of changes

What types of changes does your code introduce to Rodhaj
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (Updates to README.md, the documentation, etc)
• Other (if none of the other choices apply)

Checklist

Put an x in the boxes that apply

• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes. (if appropriate)
• All workflows (except pre-commit.ci) pass with my new changes
• This PR does not address a duplicate issue or PR

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud