Reduce the cooldown from 6 to 3 seconds

Plugins/Nautilus.Game.Arcade/src/nautilus/game/arcade/game/games/lobbers/kits/KitJumper.java

@@ -29,7 +29,7 @@ public class KitJumper extends ProgressingKit
 	};
 
 	private static final Perk[] PERKS = {
-	  new PerkDoubleJump("Double Jump", 1.2, 1.2, false, 6000, true),
+	  new PerkDoubleJump("Double Jump", 1.2, 1.2, false, 3000, true),
 	  new PerkDummy("Feathered Boots", Collections.singletonList(C.cGray + "You take no fall damage.").toArray(new String[1])),
 	  new PerkCraftman()
 	};