Update what's new.md

dist/preview release/what's new.md

@@ -19,7 +19,7 @@
     - New `Material.sideOrientation` property to define clockwise or counter-clockwise faces selection. [Demo here](http://www.babylonjs-playground.com/#1TZJQY) ([deltakosh](https://github.com/deltakosh))
     - It is now possible to create a custom loading screen. [PR](https://github.com/BabylonJS/Babylon.js/pull/700) ([RaananW](https://github.com/RaananW))
     - Per face color and texture feature in `MeshBuilder.CreateCylinder()` ([jerome](https://github.com/jbousquie))
-    - _Arc_ feature in `CreateCylinder`, `CreateSphere`, `CreateTube` and `CreateLathe` ([jerome](https://github.com/jbousquie))
+    - _Arc_ feature in `CreateCylinder`, `CreateSphere`, `CreateTube`, `CreateDisc` and `CreateLathe` ([jerome](https://github.com/jbousquie))
     - _Slice_ feature in `MeshBuilder.CreateSphere()` ([jerome](https://github.com/jbousquie))
     - `closed` parameter in `MeshBuilder.CreateLathe()` ([jerome](https://github.com/jbousquie))
     - `diameter` parameter in `MeshBuilder.CreateCreateCylinder()` ([jerome](https://github.com/jbousquie))