Clarify invited_by comment
Clarify invited_by comment

cc. @can-007

gozer/voice-web,common-voice/common-voice,gozer/voice-web,common-voice/common-voice,gozer/voice-web,common-voice/common-voice,common-voice/common-voice,gozer/voice-web,gozer/voice-web,gozer/voice-web,gozer/voice-web