Gitte URL updated (#370)

Author: fahad19

README.md

@@ -4,7 +4,7 @@
 [![Build Status](https://img.shields.io/travis/frintjs/frint/master.svg)](http://travis-ci.org/frintjs/frint)
 [![codecov](https://codecov.io/gh/frintjs/frint/branch/master/graph/badge.svg)](https://codecov.io/gh/frintjs/frint)
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-[![Join the chat at https://gitter.im/frintjs/frintjs](https://badges.gitter.im/frintjs/frintjs.svg)](https://gitter.im/frintjs/frintjs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![Join the chat at https://gitter.im/frintjs/frint](https://badges.gitter.im/frintjs/frint.svg)](https://gitter.im/frintjs/frint)
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 > The modular JavaScript framework