Core/Battlegrounds: Corrected unit of PLAYER_POSITION_UPDATE_INTERVAL, should be milliseconds not seconds

Port From (https://github.com/TrinityCore/TrinityCore/commit/d0a5d04c4c8f17ecd0ba6efaa114da051d303155)

Source/Framework/Constants/BattleGroundsConst.cs

@@ -32,7 +32,7 @@ namespace Framework.Constants
         public const uint BuffRespawnTime = 180;                // Secs
         public const uint BattlegroundCountdownMax = 120;       // Secs
         public const uint ArenaCountdownMax = 60;               // Secs
-        public const uint PlayerPositionUpdateInterval = 5;     // secs
+        public const uint PlayerPositionUpdateInterval = 5000;  // Ms
 
         //EventIds
         public const int EventIdFirst = 0;