updating DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -59,6 +59,7 @@
   * [LongestCommonSubsequence](https://github.com/TheAlgorithms/Javascript/blob/master/Dynamic-Programming/LongestCommonSubsequence.js)
   * [LongestIncreasingSubsequence](https://github.com/TheAlgorithms/Javascript/blob/master/Dynamic-Programming/LongestIncreasingSubsequence.js)
   * [MaxNonAdjacentSum](https://github.com/TheAlgorithms/Javascript/blob/master/Dynamic-Programming/MaxNonAdjacentSum.js)
+  * [MinimumCostPath](https://github.com/TheAlgorithms/Javascript/blob/master/Dynamic-Programming/MinimumCostPath.js)
   * [NumberOfSubsetEqualToGivenSum](https://github.com/TheAlgorithms/Javascript/blob/master/Dynamic-Programming/NumberOfSubsetEqualToGivenSum.js)
   * [SieveOfEratosthenes](https://github.com/TheAlgorithms/Javascript/blob/master/Dynamic-Programming/SieveOfEratosthenes.js)
   * [ZeroOneKnapsack](https://github.com/TheAlgorithms/Javascript/blob/master/Dynamic-Programming/ZeroOneKnapsack.js)