Add git-repo-updater link

Author: unixorn

README.md

@@ -119,7 +119,8 @@ If you aren't using any zsh frameworks, or if you're a bash user, do the followi
 * [git-graph](https://github.com/jerith666/git-graph) - creates a Graphviz graph showing the high-level structure of a repository's history.
 * [git-gutter](https://github.com/jisaacks/GitGutter) - Plugin for Sublime Text 2/3 to display the git diff in the edit window gutter.
 * [git-it-on.zsh](https://github.com/peterhurford/git-it-on.zsh) - Another plugin by Peter Hurford that adds a gitit command that will open your current directory on github, in your current branch.
-* [git-quick-stats](https://github.com/arzzen/git-quick-stats) - A simple and efficient way to access various statistics in git repository
+* [git-quick-stats](https://github.com/arzzen/git-quick-stats) - A simple and efficient way to access various statistics in git repository.
+* [git-repo-updater](https://github.com/earwig/git-repo-updater) - Allows you to easily update multiple git repositories at once.
 * [git-secrets](https://github.com/awslabs/git-secrets) - Prevents you from committing secrets and credentials into git repositories.
 * [git-standup](https://github.com/kamranahmedse/git-standup) - Recall what you did on the last working day. Can work in a directory full of git repos to see a consolidated view of all work in all the repos.
 * [git-submodule-tools](https://github.com/kollerma/git-submodule-tools) - A collection of scripts that should help make life with git submodules easier.