Update Documentation/ReleaseNotes.md
Update Documentation/ReleaseNotes.md

Co-Authored-By: Julia Schwarz <4ad3dc992ad5e6b951fd602d4e676fad16b873b6@gmail.com>
killerantz/HoloToolkit-Unity,killerantz/HoloToolkit-Unity,killerantz/HoloToolkit-Unity,DDReaper/MixedRealityToolkit-Unity,killerantz/HoloToolkit-Unity