temp remove grappelli 4 from test matrix

Author: fdintino

.github/workflows/test.yml

@@ -23,9 +23,6 @@ jobs:
           - python-version: "3.11"
             django-version: "5.1"
             grappelli: "0"
-          - python-version: "3.12"
-            django-version: "5.1"
-            grappelli: "1"
           - python-version: "3.13"
             django-version: "5.2"
             grappelli: "0"