Update CHANGELOG.md

Author: Chman

CHANGELOG.md

@@ -7,7 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ## [2.1.7] - 2019-XX-XX
 
 ### Added
-- Excluded VR code for Stadia platform support
+- Initial Stadia platform support.
 
 ### Fixed
 - Viewport handling wasn't working correctly when FXAA or SMAA were used with builtin pipelines.