Core/Spells: Properly retrieve pet to dismiss for spells with SPELL_ATTR1_DISMISS_PET (#30928)

Author: CraftedRO

src/server/game/Spells/Spell.cpp

@@ -3448,7 +3448,7 @@ void Spell::_cast(bool skipCheck)
 
     if (Unit* unitCaster = m_caster->ToUnit())
         if (m_spellInfo->HasAttribute(SPELL_ATTR1_DISMISS_PET))
-            if (Creature* pet = ObjectAccessor::GetCreature(*m_caster, unitCaster->GetPetGUID()))
+            if (Creature* pet = ObjectAccessor::GetCreatureOrPetOrVehicle(*m_caster, unitCaster->GetPetGUID()))
                 pet->DespawnOrUnsummon();
 
     PrepareTriggersExecutedOnHit();