Stick to testing on python 3.13 until it works with 3.14 (#14)

Author: ivorbosloper

.github/workflows/checks.yml

@@ -21,7 +21,7 @@ jobs:
           - macos-latest
         python-version:
           - "3.10"
-          - "3.x"
+          - "3.13"
 
     steps:
     # Pixi should manage Python versions, but it doesn't work on Windows in GitHub Actions