Add Python 3.12 and Django 5.0 to CI matrix

.github/workflows/ci.yaml

@@ -30,12 +30,18 @@ jobs:
           - "3.9"
           - "3.10"
           - "3.11"
+          - "3.12"
         django:
           - "3.2.*"
           - "4.2.*"
+          - "5.0.*"
         exclude:
           - python: "3.11"
             django: "3.2.*"
+          - python: "3.8"
+            django: "5.0.*"
+          - python: "3.9"
+            django: "5.0.*"
 
     steps:
       - uses: actions/checkout@v2