Test PyQt5 workflow on Python 3.10 and 3.14 only

Test the lowest and highest supported Python versions, as the PyQt6 and PySide6 workflows do.

Assisted-by: Claude Opus 5.5

Author: PierreRaybaut

.github/workflows/test_pyqt5.yml

@@ -22,7 +22,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.13", "3.14"]
+        python-version: ["3.10", "3.14"]
 
     steps:
     - uses: actions/checkout@v7