ci: use Python 3.11 for wheel build step

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: cpsievert

.github/workflows/python.yml

@@ -16,7 +16,7 @@ jobs:
 
       - uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
+          python-version: '3.11'
 
       - uses: actions/setup-node@v4
         with: