Updated DirectXMesh (markdown)

DirectXMesh.md

@@ -80,6 +80,7 @@ _Note that depending on feature level, some 'valid' DXGI formats may not be supp
 
 ### Input Layout Descriptor Utilities
 * **IsValid** - Returns false if the given Direct3D 11 input layout description is invalid. _This performs many but not all of the same checks that the Direct3D debug layer performs._
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 * [[ComputeInputLayout]] - Returns the byte offsets for each element of an input layout and the implied vertex stride from a given Direct3D 11 input layout description.
 
 ### Attribute Utilities