Fix what's new

dist/preview release/what's new.md

@@ -2,7 +2,6 @@
 
 ## Major updates
 
-- Added a ParticleHelper class to create some pre-configured particle systems in a one-liner method style ([DevChris](https://github.com/yovanoc))
 - Added new `MixMaterial` to the Materials Library allowing to mix up to 8 textures ([julien-moreau](https://github.com/julien-moreau))
 - Added new `PhotoDome` object to display 360 photos. [Demo](https://www.babylonjs-playground.com/#14KRGG#0) ([SzeyinLee](https://github.com/SzeyinLee))
 - New GUI 3D controls toolset. [Complete doc + demos](http://doc.babylonjs.com/how_to/gui3d) ([Deltakosh](https://github.com/deltakosh))
@@ -10,6 +9,7 @@
 - New GUI control: the [Grid](http://doc.babylonjs.com/how_to/gui#grid) ([Deltakosh](https://github.com/deltakosh))
 - Gizmo and GizmoManager classes used to manipulate meshes in a scene. Gizmo types include: position, rotation, scale and bounding box ([TrevorDev](https://github.com/TrevorDev))
 - Particle system improvements ([Deltakosh](https://github.com/deltakosh))
+  - Added a ParticleHelper class to create some pre-configured particle systems in a one-liner method style ([DevChris](https://github.com/yovanoc))
   - Improved CPU particles rendering performance (up to x2 on low end devices)
   - Added support for `isBillboardBased`. [Doc](http://doc.babylonjs.com/babylon101/particles#alignment)
   - Added support for `minScaleX`, `minScaleY`, `maxScaleX`, `maxScaleY`. [Doc](http://doc.babylonjs.com/babylon101/particles#size)