fix: use python3.11 in tests

.github/workflows/materialization_ci.yml

@@ -33,10 +33,10 @@ jobs:
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.9
+      - name: Set up Python 3.11
         uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: 3.11
       - uses: actions/cache@v2
         with:
           path: ~/.cache/pip
@@ -47,7 +47,7 @@ jobs:
         with:
           auto-update-conda: true
           auto-activate-base: true
-          python-version: 3.9
+          python-version: 3.11
       - name: Install dependencies
         shell: bash -l {0}
         run: |