Update CHANGELOG.md

Author: Ndiritu

CHANGELOG.md

@@ -11,7 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
-## [6.3.0]
+## [6.3.0] - 2024-02-20
 
 ### Added
 - Weekly Generated v1.0 models and request builders using Kiota.