Use strings for version numbers

Author: JackWilb

.github/workflows/build-image.yml

@@ -16,9 +16,9 @@ jobs:
       fail-fast: false
       matrix:
         software-versions: [
-          {"python-version": 3.9, "django-version": 3.2, "debian-version": "bullseye"},
-          {"python-version": 3.11, "django-version": 4.2, "debian-version": "bookworm"},
-          {"python-version": 3.11, "django-version": 5.0, "debian-version": "bookworm"}
+          {"python-version": "3.9", "django-version": "3.2", "debian-version": "bullseye"},
+          {"python-version": "3.11", "django-version": "4.2", "debian-version": "bookworm"},
+          {"python-version": "3.11", "django-version": "5.0", "debian-version": "bookworm"}
         ]
         platform: [amd64]
     runs-on: ubuntu-latest