updated what's new

dist/preview release/what's new.md

@@ -5,7 +5,7 @@
 ### Major updates
  - WebGL2 context support. WebGL2 is now used instead of WebGL 1 when available. [More info here](http://doc.babylonjs.com/overviews/webgl2) ([deltakosh](https://github.com/deltakosh))
  - Complete WebVR 1.1 support including controllers for HTC Vive and Occulus. [More info here](http://doc.babylonjs.com/overviews/webvr_camera) ([raanan](https://github.com/raananw))
- - Added support for Exponential Shadow maps to replace Variance Shadow maps. [Demo](http://www.babylonjs.com/Demos/AdvancedShadows/) ([deltakosh](https://github.com/deltakosh))
+ - Added support for Exponential Shadow maps to replace Variance Shadow maps. [more info here](http://www.babylonjs-playground.com/debug.html#1CXNXC#3) - [Demo](http://www.babylonjs.com/Demos/AdvancedShadows/) ([deltakosh](https://github.com/deltakosh))
  - Support for [Vertex Array Objects](https://www.opengl.org/registry/specs/ARB/vertex_array_object.txt) ([deltakosh](https://github.com/deltakosh))
  - Support for multisample render targets. [Demo](http://www.babylonjs-playground.com/#12MKMN) ([deltakosh](https://github.com/deltakosh))
  - New Unity 5 Editor Toolkit. Complete pipeline integration [Doc](TODO) - ([MackeyK24](https://github.com/MackeyK24))