ensure proper python versions are tested in CI

Author: hburgund

.github/workflows/django.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [3.8, 3.9, 3.10, 3.11, 3.12]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
     services:
       # Label used to access the service container
       postgres: