Fixed codacy URL.

Author: pluma

README.md

@@ -2,7 +2,7 @@
 
 The official ArangoDB low-level JavaScript client for node.js and browsers.
 
-[![Build status](https://img.shields.io/travis/arangodb/arangojs.svg)](https://travis-ci.org/arangodb/arangojs) [![Coverage Status](https://img.shields.io/coveralls/arangodb/arangojs.svg)](https://coveralls.io/r/arangodb/arangojs?branch=master) [![Codacy rating](https://img.shields.io/codacy/5fd86b5508cb4c559fd65e4c8059d800.svg)](https://www.codacy.com/public/me_4/arangojs)
+[![Build status](https://img.shields.io/travis/arangodb/arangojs.svg)](https://travis-ci.org/arangodb/arangojs) [![Coverage Status](https://img.shields.io/coveralls/arangodb/arangojs.svg)](https://coveralls.io/r/arangodb/arangojs?branch=master) [![Codacy rating](https://img.shields.io/codacy/5fd86b5508cb4c559fd65e4c8059d800.svg)](https://www.codacy.com/public/me_4/arangojs_2)
 
 # Install