update changes

Author: Stephan Dilly

CHANGELOG.md

@@ -10,6 +10,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - stashing support ([#3](https://github.com/extrawurst/gitui/issues/3))
 
 ### Changed
+- performance optimization of the log tab in big repos
+- more readable default color for the commit hash in the log tab
 - log tab refreshes when head changes ([#78](https://github.com/extrawurst/gitui/issues/78))
 
 ### Fixes