[6.x] update changelog

Author: TBlindaruk

CHANGELOG-6.x.md

@@ -1,6 +1,11 @@
 # Release Notes for 6.x
 
-## [Unreleased](https://github.com./laravel/framework/compare/v6.20.22...6.x)
+## [Unreleased](https://github.com./laravel/framework/compare/v6.20.23...6.x)
+
+
+## [v6.20.23 (2021-04-13)](https://github.com./laravel/framework/compare/v6.20.22...v6.20.23)
+
+### Added strings to the `DetectsLostConnections.php` ([4210258](https://github.com./laravel/framework/commit/42102589bc7f7b8533ee1b815ef0cc18017d4e45))
 
 
 ## [v6.20.22 (2021-03-31)](https://github.com./laravel/framework/compare/v6.20.21...v6.20.22)