Scripts: Add missing override

src/server/scripts/Outland/CoilfangReservoir/TheSlavePens/boss_ahune.cpp

@@ -888,7 +888,7 @@ public:
             GetCaster()->CastSpell(GetHitUnit(), SPELL_SUMMON_ICE_SPEAR_BUNNY, true);
         }
 
-        void Register()
+        void Register() override
         {
             OnEffectHitTarget += SpellEffectFn(spell_ice_spear_target_picker_SpellScript::HandleDummy, EFFECT_0, SPELL_EFFECT_DUMMY);
         }