Update github workflows to Python 3.10

.github/workflows/AppFwkUnitTestLinux.yml

@@ -37,7 +37,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v1
         with:
-          python-version: 3.8
+          python-version: 3.10
       - name: Install Python modules
         run: |
           python -m pip install --upgrade pip