Don't use translation string for SHULKER_BOX default name

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/event/inventory/InventoryType.java

@@ -73,7 +73,7 @@ public enum InventoryType {
     /**
      * A shulker box inventory, with 27 slots of type CONTAINER.
      */
-    SHULKER_BOX(27, "container.shulkerBox"),
+    SHULKER_BOX(27, "Shulker Box"),
     ;
 
     private final int size;