Update src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>

Author: armeetj

src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java

@@ -110,7 +110,7 @@ public String toString() {
         LinkedListNode current = head;
         if (current == null) return null;
         do {
-            list += Integer.toString(current.getValue()) + ", ";
+            list += Integer.toString(current.value()) + ", ";
             current = current.getNext();
         } while (current != null);