What's new update

dist/preview release/what's new.md

@@ -16,6 +16,10 @@
 
 - Ammo.js IDL exposed property update and raycast vehicle stablization support ([MackeyK24](https://github.com/MackeyK24))
 
+### Materials
+
+- Added the `roughness` and `albedoScaling` parameters to PBR sheen ([Popov72](https://github.com/Popov72))
+
 ## Bugs
 
 - Fix infinite loop in `GlowLayer.unReferenceMeshFromUsingItsOwnMaterial` ([Popov72](https://github.com/Popov72)