chore(MADEWITHVRTK.md): add new games to list
chore(MADEWITHVRTK.md): add new games to list

Add two new games to the list
thestonefox/SteamVR_Unity_Toolkit,thestonefox/VRTK,mattboy64/SteamVR_Unity_Toolkit,adamjweaver/VRTK,gomez-addams/SteamVR_Unity_Toolkit,gpvigano/SteamVR_Unity_Toolkit,TMaloteaux/SteamVR_Unity_Toolkit,Fulby/VRTK,gpvigano/VRTK,Innoactive/IA-unity-VR-toolkit-VRTK