Drop Python 3.8/3.9 from the test matrix

Author: lionick

.github/workflows/python-app.yml

@@ -18,8 +18,6 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-          - '3.8'
-          - '3.9'
           - '3.10'
           - '3.11'