[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/v6.20.16...6.x)
+## [Unreleased](https://github.com/laravel/framework/compare/v6.20.17...6.x)
+
+
+## [v6.20.17 (2021-03-02)](https://github.com/laravel/framework/compare/v6.20.16...v6.20.17)
+
+### Added
+- Added new line to `DetectsLostConnections` ([#36373](https://github.com/laravel/framework/pull/36373))
 
 
 ## [v6.20.16 (2021-02-02)](https://github.com/laravel/framework/compare/v6.20.15...v6.20.16)