fix(Script/BlackTemple): Spawn Shadow Demons 30s into phase 4 (azerothcore#20335)

* schedule phase 4 demons

* whitespace

Author: Tereneckla

src/server/scripts/Outland/BlackTemple/boss_illidan.cpp

@@ -569,7 +569,10 @@ struct boss_illidan_stormrage : public BossAI
             case PHASE_DEMON:
             {
                 scheduler.CancelAll();
-                DoCastSelf(SPELL_SUMMON_SHADOW_DEMON, true);
+
+                ScheduleTimedEvent(30s, [&] {
+                    DoCastSelf(SPELL_SUMMON_SHADOW_DEMON, true);
+                }, 100s);
 
                 ScheduleTimedEvent(1s, 2500ms, [&] {
                     DoCastVictim(SPELL_SHADOW_BLAST);