Fix typo in readme

Author: kriskbx

readme.md

@@ -1,5 +1,4 @@
 # ![gtt](https://raw.githubusercontent.com/kriskbx/gitlab-time-tracker-taskbar/master/src/icons/png/64x64.png) gtt taskbar
 
->  An open source crossplatform menubar/taskbar application for GitLabs time tracking feature based on the [gtt command line interface](https://github.com/kriskbx/gitlab-time-tracker).
+>  An open source crossplatform menubar/taskbar application for GitLab's time tracking feature based on the [gtt command line interface](https://github.com/kriskbx/gitlab-time-tracker).
 
-This is a beta version, feedback and contributions are appreciated.