Update build badge in README

Author: webmakersteve

README.md

@@ -5,7 +5,7 @@ Copyright (c) 2016 Blizzard Entertainment.
 
 [https://github.com/blizzard/node-rdkafka](https://github.com/blizzard/node-rdkafka)
 
-[![Build Status](https://travis-ci.org/Blizzard/node-rdkafka.svg?branch=master)](https://travis-ci.org/Blizzard/node-rdkafka)
+[![Build Status](https://travis-ci.com/Blizzard/node-rdkafka.svg?branch=master)](https://travis-ci.com/Blizzard/node-rdkafka)
 [![npm version](https://badge.fury.io/js/node-rdkafka.svg)](https://badge.fury.io/js/node-rdkafka)
 
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