Update demo link

Author: fahrinh

README.md

@@ -3,7 +3,7 @@
 > A Vue 2.0 project example to demo how to build a grid/table with inline editing support
 
 ## Demo
-<https://sample-vue-grid-inline-editing.playground.fahri.nurul.id>
+<http://sample-vue-grid-inline-editing.demo.fahri.nurul.id/>
 
 ## Build Setup