Update CHANGELOG.md

Author: driesvints

CHANGELOG.md

@@ -1,6 +1,12 @@
 # Release Notes
 
-## [Unreleased](https://github.com/laravel/passport/compare/v10.3.0...10.x)
+## [Unreleased](https://github.com/laravel/passport/compare/v10.3.1...10.x)
+
+
+## [v10.3.1 (2022-01-25)](https://github.com/laravel/passport/compare/v10.3.0...v10.3.1)
+
+### Changed
+- Allow to use custom authorization server response ([#1521](https://github.com/laravel/passport/pull/1521))
 
 
 ## [v10.3.0 (2022-01-12)](https://github.com/laravel/passport/compare/v10.2.2...v10.3.0)