Use Python 3.9

CI complain with:
 Traceback (most recent call last):
  File "./tools/localazy/generateLocalazyConfig.py", line 39, in <module>
    action = baseAction | {
TypeError: unsupported operand type(s) for |: 'dict' and 'dict'

.github/workflows/sync-localazy.yml

@@ -12,7 +12,7 @@ jobs:
     if: github.repository == 'vector-im/element-x-android'
     steps:
       - uses: actions/checkout@v3
-      - name: Set up Python 3.8
+      - name: Set up Python 3.9
         uses: actions/setup-python@v4
         with:
           python-version: 3.8