Bump minimum version of django-taggit to 5.0

setup.py

@@ -22,7 +22,7 @@ install_requires = [
     "Django>=4.2,<6.0",
     "django-modelcluster>=6.2.1,<7.0",
     "django-permissionedforms>=0.1,<1.0",
-    "django-taggit>=4.0,<5.1",
+    "django-taggit>=5.0,<5.1",
     "django-treebeard>=4.5.1,<5.0",
     "djangorestframework>=3.15.1,<4.0",
     "django-filter>=23.3,<25",