Fix Polls - invalid emoteColor count value

[Eccleria]

file:///home/ewibot/ewibot/src/commands/polls/pollsVote.js:130
      emoteColor.repeat(nb) +
                 ^

RangeError: Invalid count value
    at String.repeat (<anonymous>)
    at file:///home/ewibot/ewibot/src/commands/polls/pollsVote.js:130:18
    at Array.reduce (<anonymous>)
    at pollVoteHandler (file:///home/ewibot/ewibot/src/commands/polls/pollsVote.js:124:31)
    at voteButtonHandler (file:///home/ewibot/ewibot/src/commands/polls/pollsHandlers.js:43:11)
    at pollsButtonHandler (file:///home/ewibot/ewibot/src/commands/polls/pollsHandlers.js:21:29)
    at Timeout.pollBufferLoop [as _onTimeout] (file:///home/ewibot/ewibot/src/commands/polls/pollsCollectors.js:41:13)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)