Update Documentation/README_Pointers.md
Update Documentation/README_Pointers.md

Co-Authored-By: DirkSonguer <a00b27378a09822d5638cdfb8c2e7ccc36d74c56@songuer.de>
killerantz/HoloToolkit-Unity,killerantz/HoloToolkit-Unity,killerantz/HoloToolkit-Unity,killerantz/HoloToolkit-Unity,DDReaper/MixedRealityToolkit-Unity