force use the iList for able to return the order with format like arr…

…ay or list.

osu.Game.Rulesets.Karaoke/IO/Serialization/Converters/TimeTagsConverter.cs

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Collections.Generic;
+using System.Linq;
 using osu.Game.Rulesets.Karaoke.Objects;
 using osu.Game.Rulesets.Karaoke.Utils;
 
@@ -10,6 +11,6 @@ namespace osu.Game.Rulesets.Karaoke.IO.Serialization.Converters
     public class TimeTagsConverter : SortableJsonConvertor<TimeTag>
     {
         protected override IList<TimeTag> GetSortedValue(IEnumerable<TimeTag> objects)
-            => TimeTagsUtils.Sort(objects);
+            => TimeTagsUtils.Sort(objects).ToArray();
     }
 }