fix: URL for Gitter does not appear correctly on NPM

README.md

@@ -7,7 +7,7 @@
 
 This is the API server for the Pelias project. It's the service that runs to process user HTTP requests and return results as GeoJSON by querying Elasticsearch.
 
-[![Gitter](https://badges.gitter.im/Join Chat.svg)](https://gitter.im/pelias/api?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/pelias/api?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![Build Status](https://travis-ci.org/pelias/api.png?branch=master)](https://travis-ci.org/pelias/api)
 
 ## Documentation