put pic to the back of the changelog

Author: Stephan Dilly

CHANGELOG.md

@@ -6,8 +6,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-![](assets/light-theme.png)
-
 ### Added
 - support color themes and light mode [[@MCord](https://github.com/MCord)] ([#28](https://github.com/extrawurst/gitui/issues/28))
 
@@ -18,6 +16,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - crash on commit when git name was not set ([#74](https://github.com/extrawurst/gitui/issues/74))
 - log tab shown empty in single commit repos ([#75](https://github.com/extrawurst/gitui/issues/75))
 
+![](assets/light-theme.png)
+
 ## [0.2.6] - 2020-05-18
 ### Fixed
 - fix crash help in small window size ([#63](https://github.com/extrawurst/gitui/issues/63))