cleanup changelog

Author: extrawurst

CHANGELOG.md

@@ -8,8 +8,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Unreleased
 
 ### Breaking Changes
-
-#### Changes
 * use default shell instead of bash on Unix-like OS [[@yerke](https://github.com/yerke)] ([#2343](https://github.com/extrawurst/gitui/pull/2343))
 
 ### Fixes