Update HTKToMRTKPortingGuide.md
Update HTKToMRTKPortingGuide.md

killerantz/HoloToolkit-Unity,DDReaper/MixedRealityToolkit-Unity,killerantz/HoloToolkit-Unity,vladkol/MixedRealityToolkit-Unity,killerantz/HoloToolkit-Unity,killerantz/HoloToolkit-Unity,vladkol/MixedRealityToolkit-Unity,vladkol/MixedRealityToolkit-Unity