What's new doc?

dist/preview release/what's new.md

@@ -335,6 +335,7 @@
 - Fix for bug where directional lights are inverted when using a right handed scene coordinate system. ([drigax](https://github.com/drigax))
 - Fix subSurface parameters not copied in the PBR clone methods ([Popov72](https://github.com/Popov72))
 - Fix for bug where round-tripped glTF imported scenes are encapsulated in a second root node ([#6349](https://github.com/BabylonJS/Babylon.js/issues/6349))([drigax](https://github.com/drigax) & [noalak](https://github.com/noalak))
+- Fix for bug where round-tripped glTF imported scenes have incorrect light orientation, and duplicated parent nodes ([#7377](https://github.com/BabylonJS/Babylon.js/issues/7377))([drigax](https://github.com/drigax))
 
 ## Breaking changes