Fix copy-and-pasteo in comment.

Author: Etsuro Fujita

src/backend/executor/nodeModifyTable.c

@@ -1264,7 +1264,7 @@ ExecDeleteEpilogue(ModifyTableContext *context, ResultRelInfo *resultRelInfo,
 							 false);
 
 		/*
-		 * We've already captured the NEW TABLE row, so make sure any AR
+		 * We've already captured the OLD TABLE row, so make sure any AR
 		 * DELETE trigger fired below doesn't capture it again.
 		 */
 		ar_delete_trig_tcs = NULL;