Core/Items: Fixed soulbound tradeable items not being properly update once every second (#29416)

In the current code they were updated only if the difftime went above 1 second.

src/server/game/Entities/Player/Player.cpp

@@ -990,13 +990,12 @@ void Player::Update(uint32 p_time)
 
     Unit::AIUpdateTick(p_time);
 
-    // Update items that have just a limited lifetime
+    // Once per second, update items that have just a limited lifetime
     if (now > m_Last_tick)
+    {
         UpdateItemDuration(uint32(now - m_Last_tick));
-
-    // check every second
-    if (now > m_Last_tick + 1)
         UpdateSoulboundTradeItems();
+    }
 
     // If mute expired, remove it from the DB
     if (GetSession()->m_muteTime && GetSession()->m_muteTime < now)