updating DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -252,9 +252,11 @@
  * [Problem5](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem5.js)
  * [Problem6](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem6.js)
  * [Problem7](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem7.js)
+ * [Problem8](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem8.js)
  * [Problem9](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem9.js)
  * test
  * [Problem10](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/test/Problem10.test.js)
+ * [Problem8](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/test/Problem8.test.js)
 
 ## Recursive
  * [BinaryEquivalent](https://github.com/TheAlgorithms/Javascript/blob/master/Recursive/BinaryEquivalent.js)