Update python to 3.10

.github/workflows/lint.yml

@@ -11,10 +11,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Set up Python 3.9
+      - name: Set up Python 3.10
         uses: actions/setup-python@v1
         with:
-          python-version: 3.9
+          python-version: 3.10
       - uses: actions/cache@v2
         with:
           path: venv/