updating DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -50,6 +50,7 @@
 ## Graphs
   * [ConnectedComponents](https://github.com/TheAlgorithms/Javascript/blob/master/Graphs/ConnectedComponents.js)
   * [DepthFirstSearch](https://github.com/TheAlgorithms/Javascript/blob/master/Graphs/DepthFirstSearch.js)
+  * [DepthFirstSearchIterative](https://github.com/TheAlgorithms/Javascript/blob/master/Graphs/DepthFirstSearchIterative.js)
   * [DepthFirstSearchRecursive](https://github.com/TheAlgorithms/Javascript/blob/master/Graphs/DepthFirstSearchRecursive.js)
   * [Dijkstra](https://github.com/TheAlgorithms/Javascript/blob/master/Graphs/Dijkstra.js)
   * [DijkstraSmallestPath](https://github.com/TheAlgorithms/Javascript/blob/master/Graphs/DijkstraSmallestPath.js)