chore: update test matrix (add django 5)

Author: wookkl

.github/workflows/test.yml

@@ -47,7 +47,7 @@ jobs:
     strategy:
       matrix:
         python: ["3.9", "3.10", "3.11", "3.12"]
-        django: ["4.2"]
+        django: ["4.2", "5.0"]
         database: ["sqlite", "postgres", "mysql"]
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}