Update CHANGELOG.md

Author: gkjohnson

javascript/CHANGELOG.md

@@ -4,6 +4,10 @@ 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).
 
+## Unreleased
+### Fixed
+- Internal URDF material colors are implicitly converted to Linear colors.
+
 ## [0.10.3] - 2021-04-29
 ### Fixed
 - Types for the loadMeshCb function.