Update README.md

Updated build badge URL

Author: Roach

README.md

@@ -1,7 +1,7 @@
 python-rtmbot
 =============
 
-[![Build Status](https://travis-ci.org/slackhq/python-rtmbot.png)](https://travis-ci.org/slackhq/python-rtmbot)
+[![Build Status](https://travis-ci.org/slackapi/python-rtmbot.png)](https://travis-ci.org/slackapi/python-rtmbot)
 [![Coverage Status](https://coveralls.io/repos/github/slackhq/python-rtmbot/badge.svg?branch=master)](https://coveralls.io/github/slackhq/python-rtmbot?branch=master)
 
 A Slack bot written in Python that connects via the RTM API.