Update test result missed in the previous cset

mysql-test/suite/pbxt/r/group_min_max.result

@@ -2258,7 +2258,7 @@ a IN (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	15	Using where
 1	PRIMARY	t1_outer	ref	a	a	5	<subquery2>.max(b)	1	Using index
-2	SUBQUERY	t1	index	NULL	a	10	NULL	15	Using index
+2	MATERIALIZED	t1	index	NULL	a	10	NULL	15	Using index
 EXPLAIN SELECT 1 FROM t1 AS t1_outer GROUP BY a HAVING 
 a > (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra