Fix ExprWithFireResistance Mutating Original Item - #8943

Problem

ExprWithFireResistance clones the array instead of the item, causing the original item to be mutated

set {_sword} to 1 of diamond sword
set {_copy} to {_sword} with fire resistance
if {_sword} is fire resistant:
    broadcast "resistant"

Solution

Clone the item instead of the array

Testing Completed

Manual in-game test before & after

Supporting Information

Completes: none
Related: none
AI assistance: none