👷 Update CI to test against Django 5.2

Author: sergei-maertens

.github/workflows/ci.yml

@@ -20,10 +20,10 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
+          python-version: '3.12'
 
-      - name: Install Django 4.2
-        run: pip install django~=4.2.0
+      - name: Install Django 5.2
+        run: pip install django~=5.2.0
 
       - name: Run the startproject command
         run: |