Modify Contributor List Message

[Sarahtonein]

Currently when listing contributors, the message is quite small making it hard to see the emoji/contributor. Not only this but each contributor is added on a newline. While this was ok for a small number of contributors, this is no longer the case.

Would consider making the bot post two separate messages:

first:

# :fire: List of Contributors :fire:

second:

<emote1> <emote2>