Given an int list length 3, if there is a 2 in the list immediately followed by a 3, set the 3 element to 0. Return the changed list. For example: fix23([1, 2, 3]) → [1, 2, 0] fix23([2, 3, 5]) → [2, 0, 5] fix23([1, 2, 1]) → [1, 2, 1]