Fixes #22247: use ContentType.name for related_object_type display on custom field detail (#22248)

netbox/templates/extras/customfield/attrs/type.html

@@ -1 +1 @@
-{% load helpers %}{{ object.get_type_display }}{% if object.related_object_type %} ({{ object.related_object_type.model|bettertitle }}){% endif %}
+{% load helpers %}{{ object.get_type_display }}{% if object.related_object_type %} ({{ object.related_object_type.name|bettertitle }}){% endif %}