test cache

.github/workflows/python-build.yml

@@ -13,7 +13,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: '3.11'
+        python-version: '3.11' # avoid bugs in new versions
         cache: 'pip'
         cache-dependency-path: pyproject.toml