Updated the changelog.

com.unity.render-pipelines.lightweight/CHANGELOG.md

 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- Updated the UI for the Lighweight pipeline asset 
+
 ### Fixed
 - GLCore compute buffer compiler error
 - Occlusion strength not being applied on LW standard shaders