Update CHANGELOG

Author: Stephen Powis

CHANGELOG.md

@@ -2,7 +2,7 @@
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## 2.3.0 (UNRELEASED)
+## 2.3.0 (06/19/2019)
 #### New Features
 - [ISSUE-166](https://github.com/SourceLabOrg/kafka-webview/issues/166) Add groupSearchFilter property to specify the filter used to list LDAP group membership. Thanks for the contribution @[BlueIcarus](https://github.com/BlueIcarus)!
 - [MultiThreaded Consumer](https://github.com/SourceLabOrg/kafka-webview/pull/170) Add multi-threaded kafka consumer.