Update README.md

Author: JohannesHoppe

README.md

@@ -16,7 +16,7 @@ Brought to you by the [angular.schule](https://angular.schule/) team!
 
 This command is similar to the old `github-pages:deploy` command of @angular/cli which was removed in [#4385](https://github.com/angular/angular-cli/pull/4385).
 The [angular-cli-ghpages](https://github.com/angular-schule/angular-cli-ghpages) command is able to push to any branch on any repository. It's made on top of [tschaub/gh-pages](https://github.com/tschaub/gh-pages).
-**This script works great on Travis CI and  CircleCi.** No git credentials must be set up in before. Specific environment variables of Travis-CI are evaluated, too. You will like it!
+**This script works great on Travis CI and  CircleCi.** No git credentials must be set up in before (use GH_TOKEN instead!). Specific environment variables of Travis-CI are evaluated, too. You will like it!
 
 ## Changelog