ci: update another job to python 3.10

Author: machow

.github/workflows/ci.yml

@@ -86,7 +86,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: "3.10"
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip