updating DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -23,6 +23,7 @@
 
 ## Dynamic-Programming
   * [Longest-Palindromic-Subsequence](https://github.com/TheAlgorithms/Go/blob/master/dynamic-programming/longest-palindromic-subsequence.go)
+  * [Longestcommonsubsequence](https://github.com/TheAlgorithms/Go/blob/master/dynamic-programming/longestCommonSubsequence.go)
   * [Matrix-Multiplication](https://github.com/TheAlgorithms/Go/blob/master/dynamic-programming/matrix-multiplication.go)
   * [Rod-Cutting](https://github.com/TheAlgorithms/Go/blob/master/dynamic-programming/rod-cutting.go)