Restore the missing semicolon in ItemsController#create so the Java compilation step succeeds.

src/main/java/com/kyndryl/platform/service/ItemsController.java

@@ -41,7 +41,7 @@ public class ItemsController {
         Item item = new Item(id,
             body.getOrDefault("name", "unnamed"),
             body.getOrDefault("description", ""));
-        store.put(id, item)
+        store.put(id, item);
         return item;
     }