Fix comment in execParallel.c

0f61727 has made this comment incorrect.

Author: Julien Rouhaud
Reviewed-by: Matthias van de Meent
Discussion: https://postgr.es/m/20220326160117.qtp5nkuku6cvhcby@jrouhaud

Author: michaelpq

src/backend/executor/execParallel.c

@@ -1420,7 +1420,7 @@ ParallelQueryMain(dsm_segment *seg, shm_toc *toc)
 	/* Setting debug_query_string for individual workers */
 	debug_query_string = queryDesc->sourceText;
 
-	/* Report workers' query and queryId for monitoring purposes */
+	/* Report workers' query for monitoring purposes */
 	pgstat_report_activity(STATE_RUNNING, debug_query_string);
 
 	/* Attach to the dynamic shared memory area. */