Core/Items: Fixed sending unlocked items by mail

Closes #20976

src/server/game/Spells/SpellEffects.cpp

@@ -1807,7 +1807,10 @@ void Spell::EffectOpenLock(SpellEffIndex effIndex)
             SendLoot(guid, LOOT_SKINNING);
     }
     else if (itemTarget)
+    {
         itemTarget->SetFlag(ITEM_FIELD_FLAGS, ITEM_FIELD_FLAG_UNLOCKED);
+        itemTarget->SetState(ITEM_CHANGED, itemTarget->GetOwner());
+    }
 
     // not allow use skill grow at item base open
     if (!m_CastItem && skillId != SKILL_NONE)