Add Python 3.12 to CI test matrix.

[Mr-Sunglasses]

Description

Add Python 3.12 to CI test matrix

• Updated the GitHub Actions workflow to include Python 3.12 in the test matrix

Closes

Fixes #26

[sourcery-ai]

🧙 Sourcery has finished reviewing your pull request!

---

Tips

• Trigger a new Sourcery review by commenting @sourcery-ai review on the pull request.
• Continue your discussion with Sourcery by replying directly to review comments.
• You can change your review settings at any time by accessing your dashboard:
  • Enable or disable the Sourcery-generated pull request summary or reviewer's guide;
  • Change the review language;
• You can always contact us if you have any questions or feedback.

[sourcery-ai]

We've reviewed this pull request using the Sourcery rules engine. If you would also like our AI-powered code review then let us know.

[JacobCoffee]

Thanks!