Update README.md

Author: tivie

README.md

@@ -1,7 +1,7 @@
 Showdown's Twitter Extension
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-[![Build Status](https://travis-ci.org/showdownjs/twitter-extension)](https://travis-ci.org/showdownjs/twitter-extension.svg) [![npm version](https://badge.fury.io/js/showdown-twitter.svg)](http://badge.fury.io/js/showdown-twitter) [![npm version](https://badge.fury.io/bo/showdown-twitter.svg)](http://badge.fury.io/bo/showdown-twitter) 
+[![Build Status](https://travis-ci.org/showdownjs/twitter-extension.svg)](https://travis-ci.org/showdownjs/twitter-extension) [![npm version](https://badge.fury.io/js/showdown-twitter.svg)](http://badge.fury.io/js/showdown-twitter) [![npm version](https://badge.fury.io/bo/showdown-twitter.svg)](http://badge.fury.io/bo/showdown-twitter) 
 
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