update change log

CHANGELOG.md

@@ -3,6 +3,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [6.19.0] - 2023-08-14
+### Added
+- Added variable `enable_hive_housekeeper` to support hive metastore lock house keeper.
+
 ## [6.18.4] - 2023-06-28
 ### Added
 - Added variable `hms_ro_request_partition_limit` & `hms_rw_request_partition_limit` to set hive metastore limit of partition requests.