Get a random element from an Elixir List

In order to complete this mission we will reach for the Enum module which has a function defined in it random/1. This function expects its single argument to be the enum passed to it, in this case an elixr List. Below is an example usage:

iex(1)> list = ["cat", "dog", "turtle"]
["cat", "dog", "turtle"]
iex(2)> Enum.random(list)