Pin formatting CI python version

To work around python/mypy#13627

Author: nsmith-

.github/workflows/ci.yml

@@ -18,6 +18,8 @@ jobs:
       with:
         submodules: recursive
     - uses: actions/setup-python@v3
+      with:
+        python-version: 3.10.6
     - uses: pre-commit/[email protected]
       with:
         extra_args: --hook-stage manual --all-files