Update Python version format in GitHub Actions workflow

- Changed the Python version specification in `test-comprehensive.yml` from unquoted to quoted strings for consistency and improved readability.
- Ensured minimal changes to existing code while enhancing clarity in the workflow configuration.

Author: MervinPraison

.github/workflows/test-comprehensive.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.10, 3.11]
+        python-version: ["3.10", "3.11"]
 
     steps:
     - name: Checkout code