Updated Geometry formats (markdown)

Geometry-formats.md

@@ -43,7 +43,7 @@ The SDKMesh format is a sample runtime format that was created for Direct3D 10 a
 
 SDKMESH is supported as a runtime format by DXUT's CDXUTSDKMesh loader class and DirectXTK's Model class.
 
-[DirectX Tool Kit](http://go.microsoft.com/fwlink/?LinkId=248929)
+SDKMESH v2 was introduced for use with the _DirectX Tool Kit_ for [DX11](http://go.microsoft.com/fwlink/?LinkId=248929) / [DX12](http://go.microsoft.com/fwlink/?LinkID=615561) to support PBR materials definitions instead of traditional diffuse/specular materials.
 
 [DXUT for Direct3D 11](http://go.microsoft.com/fwlink/?LinkId=320437)