fix(Scripts/Hyjal): Archimonde shouldn't cast other spells during enr… (#18928)

fix(Scripts/Hyjal): Archimonde shouldn't cast other spells during enrage/outro

src/server/scripts/Kalimdor/CavernsOfTime/BattleForMountHyjal/boss_archimonde.cpp

@@ -256,6 +256,7 @@ struct boss_archimonde : public BossAI
         }
 
         ScheduleHealthCheckEvent(10, [&]{
+            scheduler.CancelAll();
             me->SetReactState(REACT_PASSIVE);
             DoCastProtection();
             Talk(SAY_ENRAGE);