Update What's New

dist/preview release/what's new.md

@@ -25,7 +25,7 @@
 #### Minor Updates
  - Fix Rotation issue when the Parent's Primitive hadn't a identity scale. ([nockawa](https://github.com/nockawa))
  - Primitive's position computed from TrackedNode are now hidden when the node is out of the Viewing Frustum ([nockawa](https://github.com/nockawa))
-
+ - WorldSpaceCanvas: TrackNode feature, a WSC can follow a Scene Node with an optional billboarding feature (always facing the camera)[Demo](http://babylonjs-playground.com/#1KYG17#1)
 
 ### Exporters