Test with Django 5.2.3, 5.1.11, and 4.2.23 (#1082)

Author: mbraak

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        django: ["django==4.2.21", "django==5.1.9", "django==5.2.1"]
+        django: ["django==4.2.23", "django==5.1.11", "django==5.2.3"]
 
     services:
       postgres: