Fix python matrix for 3.10 being recognized as 3.1

Ref: actions/setup-python#160

Author: rnazali

.github/workflows/django.yaml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [ 3.10, 3.11, 3.12 ]
+        python-version: [ '3.10', '3.11', '3.12' ]
     defaults:
       run:
         working-directory: ./source