Update tests_common.yml python version

From 3.8 to 3.11 (it seems 3.8 is not supported in github workflows anymore).

.github/workflows/tests_common.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Install Python 3
         uses: actions/setup-python@v1
         with:
-          python-version: 3.8
+          python-version: 3.11
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip