Update Python version matrix in wheels.yml

Removed Python version 'cp38-*' from the workflow matrix.

Author: fbergmann

.github/workflows/wheels.yml

@@ -34,7 +34,7 @@ jobs:
       matrix:
         # macos-15-intel is an Intel runner, macos-14 is Apple silicon
         os: [ubuntu-latest, ubuntu-24.04-arm, windows-latest, windows-11-arm, macos-15-intel, macos-14]
-        python_version: ['cp38-*', 'cp39-*', 'cp310-*', 'cp311-*', 'cp312-*', 'cp313-*', 'cp314-*']
+        python_version: ['cp39-*', 'cp310-*', 'cp311-*', 'cp312-*', 'cp313-*', 'cp314-*']
 
     steps:
       - uses: actions/download-artifact@v4