update changelog

Author: Stephan Dilly

CHANGELOG.md

@@ -7,13 +7,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+**tag annotation support**
+
+![tag-annotation](assets/tag-annotation.gif)
+
 **revert commit from rev log**
 
 ![revert-commit](assets/revert-commit.gif)
 
 ### Added
 - allow reverting a commit from the commit log ([#927](https://github.com/extrawurst/gitui/issues/927))
 - disable pull cmd on local-only branches ([#1047](https://github.com/extrawurst/gitui/issues/1047))
+- support adding annotations to tags ([#747](https://github.com/extrawurst/gitui/issues/747))
 
 ### Fixed
 - Keep commit message when pre-commit hook fails ([#1035](https://github.com/extrawurst/gitui/issues/1035))