fix: return serializer.data when updating a Timeslot

program/views.py

@@ -731,7 +731,7 @@ class APITimeSlotViewSet(
                 return Response(serializer.data)
 
             # ...or nothing if there isn't one
-            return Response(status=status.HTTP_200_OK)
+            return Response(serializer.data, status=status.HTTP_200_OK)
 
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)