Use Python 3.11 for cutting releases.

Author: jaraco

.github/workflows/main.yml

@@ -52,7 +52,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v3
         with:
-          python-version: "3.10"
+          python-version: "3.11-dev"
       - name: Install tox
         run: |
           python -m pip install tox