Fix comment in pg_proc.c

pgstat_create_function() creates stats for a function in a transactional
fashion, so the stats would be dropped if transaction creating the
function is aborted, not committed.

Author: Amul Sul
Discussion: https://postgr.es/m/CAAJ_b97x1T3xgAMWNj4w7kSgN0nTuG-vLrQJ4NB-dsNr0Kudxw@mail.gmail.com

src/backend/catalog/pg_proc.c

@@ -710,7 +710,7 @@ ProcedureCreate(const char *procedureName,
 			AtEOXact_GUC(true, save_nestlevel);
 	}
 
-	/* ensure that stats are dropped if transaction commits */
+	/* ensure that stats are dropped if transaction aborts */
 	if (!is_update)
 		pgstat_create_function(retval);