Update Python versions in GitHub workflows

Author: PierreRaybaut

.github/workflows/python-package-PyQt5.yml

@@ -21,7 +21,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.11", "3.12"]
 
     steps:
     - uses: actions/checkout@v3

.github/workflows/python-package-PyQt6.yml

@@ -21,7 +21,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.11", "3.12"]
 
     steps:
     - uses: actions/checkout@v3

.github/workflows/python-package-PySide6.yml

@@ -21,7 +21,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.11", "3.12"]
 
     steps:
     - uses: actions/checkout@v3