Update README.md

Author: bknds

README.md

@@ -13,7 +13,7 @@ Angular 4+, Angular CLI, TypeScript, Scss, Bootstrap
 
 ## Demo
 
-[Live Demo](http://treesflower.com/ng-pi-admin)
+[Live Demo](https://treesflower.com/ng-pi-admin)
 
 ## Getting started
 ```