Make one more parameter a final

Author: SKBotNL

src/mixins/java/org/spongepowered/common/mixin/core/world/entity/MobMixin.java

@@ -227,7 +227,7 @@ public LivingEntity getTarget() {
                     ordinal = 0
             )
     )
-    private boolean impl$hurt(final net.minecraft.world.entity.Entity targetEntity, final DamageSource damageSource, float originalAttackDamage) {
+    private boolean impl$hurt(final net.minecraft.world.entity.Entity targetEntity, final DamageSource damageSource, final float originalAttackDamage) {
         AttackEntityEvent attackEntityEvent = impl$attackEntityEvent;
         float attackDamage;
         if (attackEntityEvent != null) {