Fix linter error

Author: tobiasge

.github/workflows/push.yml

@@ -26,7 +26,7 @@ jobs:
           fetch-depth: 0
       - uses: actions/setup-python@v5
         with:
-          python-version: '3.9'
+          python-version: "3.9"
       - name: Lint Code Base
         uses: github/super-linter@v7
         env: