update python version in workflow

Author: wing328

.github/workflows/samples-python-server.yaml

@@ -21,7 +21,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: actions/setup-python@v6
         with:
-          python-version: '3.9'
+          python-version: '3.10'
       - name: Test
         working-directory: ${{ matrix.sample }}
         run: make test-all