ci(tests) Add Django 5.2 to test matrix

Author: tony

.github/workflows/tests.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         python-version: ['3.10', '3.14']
-        django-version: ['4.2', '5.1']
+        django-version: ['4.2', '5.1', '5.2']
     steps:
       - uses: actions/checkout@v4