Add Reroll to the giveaway bot

[3.521]

the title will imply it, this would be useful if the winner doesn't want the prize or for any other reason

right now when you try to reroll you get:Users have already been picked by the bot, you can't use this function anymore

[1.824]

If you need to reroll a single winner (only 1) you can open a thread in staff support and it will be done. The bot was coded only to be used once.

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