Adds recognition for Yan Zhang's contribution

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ### Fixed
 
+- Fixes [#620](https://github.com/eamodio/vscode-gitlens/issues/620) - Branch names with only digits always appear first — thanks to [PR #621](https://github.com/eamodio/vscode-gitlens/pull/621) by Yan Zhang ([@Eskibear](https://github.com/Eskibear))
 - Fixes [#626](https://github.com/eamodio/vscode-gitlens/issues/626) - Branch names with only digits always appear first — thanks to [PR #627](https://github.com/eamodio/vscode-gitlens/pull/627) by Marc Lasson ([@mlasson](https://github.com/mlasson))
 
 ## [9.4.1] - 2019-01-08

README.md

@@ -922,6 +922,7 @@ A big thanks to the people that have contributed to this project:
 - SpaceEEC ([@SpaceEEC](https://github.com/SpaceEEC)) — [contributions](https://github.com/eamodio/vscode-gitlens/commits?author=SpaceEEC)
 - Skybbles // L5474 ([@Luxray5474](https://github.com/Luxray5474)) — [contributions](https://github.com/eamodio/vscode-gitlens/commits?author=Luxray5474)
 - Alexey Vasyukov ([@notmedia](https://github.com/notmedia)) — [contributions](https://github.com/eamodio/vscode-gitlens/commits?author=notmedia)
+- Yan Zhang ([@Eskibear](https://github.com/Eskibear)) — [contributions](https://github.com/eamodio/vscode-gitlens/commits?author=Eskibear)
 - Zyck ([@qzyse2017](https://github.com/qzyse2017)) — [contributions](https://github.com/eamodio/vscode-gitlens/commits?author=qzyse2017)
 
 Also special thanks to the people that have provided support, testing, brainstorming, etc: