Actually fix .copyitem test

I was testing with AutoArmor enabled, which removed the helmet from the hand slot for me. Didn't realize that right-clicking a helmet in creative mode is supposed to duplicate it.

This new command simply puts the helmet directly on the player's head.

src/main/java/net/wurstclient/test/CopyItemCmdTest.java

@@ -22,8 +22,7 @@ public static void testCopyItemCmd()
 		setPerspective(Perspective.THIRD_PERSON_FRONT);
 
 		// Put on a golden helmet
-		runChatCommand("give @s golden_helmet");
-		rightClickInGame();
+		runChatCommand("item replace entity @s armor.head with golden_helmet");
 		takeScreenshot("copyitem_command_setup");
 		assertOneItemInSlot(39, Items.GOLDEN_HELMET);
 		assertNoItemInSlot(0);