Update pythonpackage.yml

Author: mrecachinas

.github/workflows/pythonpackage.yml

@@ -11,10 +11,10 @@ on:
 jobs:
   build-and-test:
     name: Testing with Python 3.${{ matrix.python_minor }} on Linux
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
-        python_minor: [ "6" , "7" , "8" , "9" , "10" ]
+        python_minor: [ "10" , "11" , "12" , "13" ]
 
     steps:
       - uses: actions/checkout@v4.2.2