python3Packages.django_6: 6.0.3 -> 6.0.4

https://docs.djangoproject.com/en/6.0/releases/6.0.4/
https://www.djangoproject.com/weblog/2026/apr/07/security-releases/

Fixes: CVE-2026-3902, CVE-2026-4277, CVE-2026-4292, CVE-2026-33033,
       CVE-2026-33034

pkgs/development/python-modules/django/6.nix

@@ -42,7 +42,7 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "django";
-  version = "6.0.3";
+  version = "6.0.4";
   pyproject = true;
 
   disabled = pythonOlder "3.12";
@@ -51,7 +51,7 @@ buildPythonPackage (finalAttrs: {
     owner = "django";
     repo = "django";
     tag = finalAttrs.version;
-    hash = "sha256-FXaK9e2/grRH0c4r/t+Sm9uyYHlSUx6S0klnYTW/8KQ=";
+    hash = "sha256-zm++A7gZji4W4BAB1XXtqlXKjUMBbYmaEz9RGhx3RkI=";
   };
 
   patches = [