RELEASE: 1.6.3

updated changelog, version changes in previous commit

Author: stefanunity

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -8,7 +8,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 Due to package verification, the latest version below is the unpublished version and the date is meaningless.
 however, it has to be formatted properly to pass verification tests.
 
-## [Unreleased]
+## [1.6.3] - 2023-07-11
+
+### Fixed
+- Fixed warning in USS file
 
 ## [1.6.2] - 2023-07-10