Fix Discourse Badge (parse-community#5423)

Author: dplewis

README.md

@@ -4,7 +4,7 @@
 [![Build Status](https://img.shields.io/travis/parse-community/parse-server/master.svg?style=flat)](https://travis-ci.org/parse-community/parse-server)
 [![Coverage Status](https://img.shields.io/codecov/c/github/parse-community/parse-server/master.svg)](https://codecov.io/github/parse-community/parse-server?branch=master)
 [![npm version](https://img.shields.io/npm/v/parse-server.svg?style=flat)](https://www.npmjs.com/package/parse-server)
-[![Join The Conversation](https://img.shields.io/discourse/https/communiy.parseplatform.org/topics.svg)](https://community.parseplatform.org/c/parse-server)
+[![Join The Conversation](https://img.shields.io/discourse/https/community.parseplatform.org/topics.svg)](https://community.parseplatform.org/c/parse-server)
 [![Greenkeeper badge](https://badges.greenkeeper.io/parse-community/parse-server.svg)](https://greenkeeper.io/)