Hotfix EloPlayerHandler to use internal ArenaMode name

src/de/steamwar/velocitycore/network/handlers/EloPlayerHandler.java

@@ -55,7 +55,7 @@ public class EloPlayerHandler extends PacketHandler {
         SchematicType schematicType = SchematicType.fromDB(fightEndsPacket.getGameMode());
         ArenaMode arenaMode;
         if (schematicType == null) {
-            arenaMode = ArenaMode.getByChat(fightEndsPacket.getGameMode());
+            arenaMode = ArenaMode.getByInternal(fightEndsPacket.getGameMode());
         } else {
             arenaMode = ArenaMode.getBySchemType(schematicType);
         }