Fix pipeline failure

commit '5f7cdc' didn't update the answer file expand_table.out

src/test/regress/expected/expand_table.out

@@ -914,9 +914,9 @@ CREATE VIEW expand_view AS select * from expand_table1;
 CREATE rule "_RETURN" AS ON SELECT TO expand_table2
     DO INSTEAD SELECT * FROM expand_table1;
 ALTER TABLE expand_table2 EXPAND TABLE;
-ERROR:  "expand_table2" is not a table or foreign table
+ERROR:  "expand_table2" is not a table, materialized view, or foreign table
 ALTER TABLE expand_view EXPAND TABLE;
-ERROR:  "expand_view" is not a table or foreign table
+ERROR:  "expand_view" is not a table, materialized view, or foreign table
 ALTER TABLE expand_table1 EXPAND TABLE;
 --
 -- Test expanding a table with a domain type as distribution key.