fix(api): publishers returned for WorkDetailViewSet

Slice publishers array for WorkDetailViewSet for
consisency with WorkPreviewViewSet to not return
anything beyond the first item. Prevents error
making the endpoint unavailable when more than
one publisher is (incorrectly) set.

apis_ontology/api/views.py

@@ -335,7 +335,7 @@ def get_queryset(self):
                 triple_set_from_obj__subj_id=OuterRef("pk"),
                 triple_set_from_obj__prop__name_reverse__in=["realises"],
             ).annotate(
-                publisher=Subquery(expression_publisher),
+                publisher=Subquery(expression_publisher[:1]),
                 places=ArraySubquery(expression_places),
             )
         ).values(