[commands] Update ScheduledEventConverter docs for clarity
[commands] Update ScheduledEventConverter docs for clarity

Co-authored-by: Danny <8364b57d74c8e4d5e2c8f305ec1107fe28d99398@users.noreply.github.com>
Co-authored-by: ashish  <1f4a8b99c066e37ebc84c52e8e5e7297bbb6b44f@users.noreply.github.com>
Harmon758/discord.py,rapptz/discord.py,Harmon758/discord.py,Rapptz/discord.py