docs(readme): update demo link

Raphaël Benitte · Raphaël Benitte · commit affa4a5c185a · 2018-08-01T13:31:04.000+09:00
diff --git a/README.md b/README.md
@@ -23,7 +23,7 @@
 
 ## Demo
 
-You can see a live demo of the widgets [here](https://mozaik-ext-travis-v2.herokuapp.com/)
+You can see a live demo of the widgets [here](https://mozaik-travis.herokuapp.com/)
 
 ## Install
 
