Correct coveralls url

Author: bheuvel

README.md

@@ -3,7 +3,7 @@
 [![Build Status](https://travis-ci.org/MissionCriticalCloud/vagrant-cloudstack.png?branch=master)](https://travis-ci.org/missioncriticalcloud/vagrant-cloudstack)
 [![Gem Version](https://badge.fury.io/rb/vagrant-cloudstack.png)](http://badge.fury.io/rb/vagrant-cloudstack)
 [![Code climate](https://codeclimate.com/github/MissionCriticalCloud/vagrant-cloudstack.png)](https://codeclimate.com/github/missioncriticalcloud/vagrant-cloudstack)
-[![Coverage Status](https://coveralls.io/repos/MissionCriticalCloud/vagrant-cloudstack/badge.svg?branch=master)](https://coveralls.io/r/missioncriticalcloud/vagrant-cloudstack?branch=master)
+[![Coverage Status](https://coveralls.io/repos/github/MissionCriticalCloud/vagrant-cloudstack/badge.svg?branch=master)](https://coveralls.io/github/MissionCriticalCloud/vagrant-cloudstack?branch=master)
 [![Gem Version](https://badge.fury.io/rb/vagrant-cloudstack.svg)](http://badge.fury.io/rb/vagrant-cloudstack)
 
 This is a fork of [mitchellh AWS Provider](https://github.com/mitchellh/vagrant-aws/).