fix: spotless apply should be fixed

Author: XavierCruz5106

lesson_12/structs_java/structs_app/src/main/java/com/codedifferently/lesson12/ListNode.java

@@ -1,10 +1,12 @@
 package com.codedifferently.lesson12;
 
 public class ListNode {
+
   int val;
   ListNode next;
 
-  ListNode() {}
+  ListNode() {
+  }
 
   ListNode(int val) {
     this.val = val;