[6.x] update changelog

Author: TBlindaruk

CHANGELOG-6.x.md

@@ -1,6 +1,12 @@
 # Release Notes for 6.x
 
-## [Unreleased](https://github.com/laravel/framework/compare/v6.20.21...6.x)
+## [Unreleased](https://github.com/laravel/framework/compare/v6.20.22...6.x)
+
+
+## [v6.20.22 (2021-03-31)](https://github.com/laravel/framework/compare/v6.20.21...v6.20.22)
+
+### Fixed
+- Fixed setting DynamoDB credentials ([#36822](https://github.com/laravel/framework/pull/36822))
 
 
 ## [v6.20.21 (2021-03-30)](https://github.com/laravel/framework/compare/v6.20.20...v6.20.21)