Update what's new.md

dist/preview release/what's new.md

@@ -26,3 +26,5 @@
     - `VertexData.CreateDisc()` now supports only the single _options_ parameter ([jerome](https://github.com/jbousquie))
     - `VertexData.CreateLines()` now supports only the single _options_ parameter ([jerome](https://github.com/jbousquie))
     - `VertexData.CreateDashedLines()` now supports only the single _options_ parameter ([jerome](https://github.com/jbousquie))
+    - `VertexData.CreateGround()` now supports only the single _options_ parameter ([jerome](https://github.com/jbousquie))
+    -`VertexData.CreateTiledGround()` now supports only the single _options_ parameter ([jerome](https://github.com/jbousquie))