Update README.md

Author: thomaswoehlke

README.md

@@ -5,6 +5,8 @@
 [![Codacy Security Scan](https://github.com/Spring-Framework-Java-Apps/simpleworklist/workflows/Codacy%20Security%20Scan/badge.svg)](https://github.com/Spring-Framework-Java-Apps/simpleworklist/actions)
 [![Travis CI Build Status](https://travis-ci.com/Spring-Framework-Java-Apps/simpleworklist.svg?branch=master)](https://travis-ci.com/Spring-Framework-Java-Apps/simpleworklist)
 
+* Heroku Deployment: [simpleworklist.herokuapp.com/](https://simpleworklist.herokuapp.com
+
 ## About SimpleWorklist
 
 Your Todo List for Getting Things Done