updating DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -111,6 +111,7 @@
 ## Recursive
  * [EucledianGCD](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/EucledianGCD.js)
  * [FibonacciNumberRecursive](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/FibonacciNumberRecursive.js)
+ * [Palindrome](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/Palindrome.js)
  * [TowerOfHanoi](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/TowerOfHanoi.js)
 
 ## Search