Mentions Azure DevOps Server changes in the CHANGELOG

(#4478, #4516)

Author: sergeibbb

CHANGELOG.md

@@ -16,6 +16,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 - Adds ability to set or change the upstream branch for branches in the _Commit Graph_ and other GitLens views ([#4498](https://github.com/gitkraken/vscode-gitlens/issues/4498))
   - Adds new _Set Upstream..._ and _Change Upstream..._ context menu items to branches in the _Commit Graph_ and other GitLens views
   - Adds a new _upstream_ sub-command to the _branch_ Git Command Palette
+- Add Azure DevOps Server integration support ([#4478](https://github.com/gitkraken/vscode-gitlens/issues/4478))
 
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