Made the people not be able to have the fire effect on them
This uses
org.bukkit.event.entity.EntityDamageEvent to stop the fire. This triggers if the custom name of the zombie is not "Zombie". You can still name your person "Zombie", but normal zombies with the nametagged name "Zombie" may still sometimes catch on fire. This is not common but may happen.
Fixed the incorrect argument message to only show if the arguments are incorrect. " An internal error occurred while attempting to preform this command" is still shown.