Small Spelling Fix for Tree Traversal in Java (#318)

Author: Wesley-Arrington

contents/tree_traversal/code/java/MainClass.java

@@ -22,7 +22,7 @@ public static void main(String[] args) {
         tree.dfsRecursiveInOrderBinary();
 
         tree = new Tree(3, 2);
-        System.out.println("Using in-order binary recursive DFS : (suceed)");
+        System.out.println("Using in-order binary recursive DFS : (succeed)");
         tree.dfsRecursiveInOrderBinary();