Update diff in ps-update command

Author: jonico

update-db-branch.sh

@@ -13,4 +13,4 @@ DEPLOY_REQUEST_NUMBER="$3"
 
 . ps-create-helper-functions.sh
 create-schema-change "$DB_NAME" "$BRANCH_NAME" "$ORG_NAME" "$DDL_STATEMENTS"
-create-diff-for-ci "$DB_NAME" "$ORG_NAME" "$DEPLOY_REQUEST_NUMBER" "$BRANCH_NAME"
+create-diff-for-ci "$DB_NAME" "$ORG_NAME" "$DEPLOY_REQUEST_NUMBER" "$BRANCH_NAME" "update"