refactor(api): Update URLs to use ACLAssignment routes

Replaces `interface-assignments` route with `assignments` to align with
the unified `ACLAssignment` model. Enhances consistency and
maintainability across the API by simplifying route names.

Author: pheus

netbox_acls/api/urls.py

@@ -10,7 +10,7 @@
 
 router = NetBoxRouter()
 router.register("access-lists", views.AccessListViewSet)
-router.register("interface-assignments", views.ACLInterfaceAssignmentViewSet)
+router.register("assignments", views.ACLAssignmentViewSet)
 router.register("standard-acl-rules", views.ACLStandardRuleViewSet)
 router.register("extended-acl-rules", views.ACLExtendedRuleViewSet)