Update Python CI to use supported versions only

- Remove Python 3.7 (EOL June 2023) - not available on Ubuntu 24.04
- Remove Python 3.8 (EOL October 2024)
- Test on Python 3.9, 3.10, 3.11, 3.12 (all currently supported)
- Fixes CI failure on Ubuntu 24.04 runners

Author: MissCrispenCakes

.github/workflows/python-ci.yml

@@ -19,7 +19,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.9', '3.10', '3.11', '3.12']
 
     steps:
       - name: Checkout repository