fix(Scripts/Karazhan): Fix Moroes resetting during Vanish (#25333)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: Nyeriah

src/server/scripts/EasternKingdoms/Karazhan/boss_moroes.cpp

@@ -149,7 +149,7 @@ struct boss_moroes : public BossAI
             _vanished = true;
             Talk(SAY_SPECIAL);
             DoCastSelf(SPELL_VANISH);
-            me->SetImmuneToAll(true);
+            me->SetImmuneToAll(true, true);
             scheduler.Schedule(5s, 7s, [this](TaskContext)
             {
                 me->SetImmuneToAll(false);