Update changelog.sql

Added rollback stmt back in

Author: lbjenn

Changelogs/changelog.sql

@@ -66,6 +66,7 @@ ALTER TABLE CUSTOMER ADD CONSTRAINT pk_person PRIMARY KEY (C1, C2);
 
 -- Changeset MikeO:createTable-MYTABLE55 context:DEV labels:Feature1
 CREATE TABLE MYTABLE55 (C1 STRING, C2 STRING);
+--rollback DROP TABLE MYTABLE55;
 
 --changeset mikeo:create-pi
 create or replace function pi_udf()