Fix travis badge

Author: kevmoo

README.md

@@ -1,7 +1,7 @@
 commonmark.js
 =============
 
-[![Build Status](https://img.shields.io/travis/jgm/commonmark.js/master.svg?style=flat)](https://travis-ci.org/jgm/commonmark.js)
+[![Build Status](https://img.shields.io/travis/commonmark/commonmark.js/master.svg?style=flat)](https://travis-ci.org/commonmark/commonmark.js)
 [![NPM version](https://img.shields.io/npm/v/commonmark.svg?style=flat)](https://www.npmjs.org/package/commonmark)