fix incorrect table name passing in notify broadcast (#446)

services/ui_backend_service/api/notify.py

@@ -98,7 +98,7 @@ async def handle_trigger_msg(self, msg: str):
                     # also keepalive for run heartbeats.
                     self.event_emitter.emit('run-heartbeat', 'update', data)
                     # also broadcast as a run heartbeat update, as otherwise these receive no updates
-                    await _broadcast(self.event_emitter, "UPDATE", self.db.run_table_postgres.table_name, data)
+                    await _broadcast(self.event_emitter, "UPDATE", self.db.run_table_postgres, data)
 
                 # Notify when Run parameters are ready.
                 if operation == "INSERT" and \