fix: changed LootLockerLeaderboardRewardPredicates to array

When Leaderboard Details first was introduced, I had missed that reward predicates are an array object, this commit will correct this mistake.

Author: AlmightyMikkel

Runtime/Game/Requests/LeaderboardDetailsRequest.cs

@@ -266,7 +266,7 @@ public class LootLockerLeaderboardReward
         /// <summary>
         /// The Predicates of the reward.
         /// </summary>
-        public LootLockerLeaderboardRewardPredicates predicates { get; set; }
+        public LootLockerLeaderboardRewardPredicates[] predicates { get; set; }
         /// <summary>
         /// The currency reward, will be null if the reward is of another type.
         /// </summary>