Update Documentation/Contributing/CodingGuidelines.md
Update Documentation/Contributing/CodingGuidelines.md

Co-Authored-By: Kurtis <601750f99a611216e3b3536e5835b26dc3c9b459@microsoft.com>
killerantz/HoloToolkit-Unity,killerantz/HoloToolkit-Unity,killerantz/HoloToolkit-Unity,killerantz/HoloToolkit-Unity,DDReaper/MixedRealityToolkit-Unity