update changelog

Author: Stephan Dilly

CHANGELOG.md

@@ -11,6 +11,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 - more natural scrolling in log tab ([#52](https://github.com/extrawurst/gitui/issues/52))
 
+### Fixed
+- log tab shown empty in single commit repos ([#75](https://github.com/extrawurst/gitui/issues/75))
+
 ## [0.2.6] - 2020-05-18
 ### Fixed
 - fix crash help in small window size ([#63](https://github.com/extrawurst/gitui/issues/63))