update what's new

dist/preview release/what's new.md

@@ -258,6 +258,7 @@
 - Auto Update Touch Action [#5674](https://github.com/BabylonJS/Babylon.js/issues/5674)([Sebavan](https://github.com/Sebavan))
 - Add hemispheric lighting to gizmos to avoid flat look ([TrevorDev](https://github.com/TrevorDev))
 - Fix a bug causing `WebRequest.open` to crash if `WebRequest.CustomRequestHeaders` are set [#6055](https://github.com/BabylonJS/Babylon.js/issues/6055)([susares](https://github.com/susares))
+- Fix a bug causing `Mesh.clone` to crash if no physicsEngineComponent is used  ([barroij](https://github.com/barroij))
 
 ### Viewer