code optimization

Small update and fix bugs

• fixed a small bug when a player could kill a person with the same role as scp himself, he was also replaced by it, which could sometimes lead to minor bugs and the creation of a duplicate character following scp that disappeared if you kill someone again (this error does not result in to critical errors of the game but it doesn’t look nice)

note on using configurations

• if you want to change the spawn chance of scp then change the PercentageToSpawn parameter