updating DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -207,6 +207,8 @@
  * [PatternMatching](https://github.com/TheAlgorithms/Javascript/blob/master/String/test/PatternMatching.test.js)
  * [ReverseString](https://github.com/TheAlgorithms/Javascript/blob/master/String/test/ReverseString.test.js)
  * [ReverseWords](https://github.com/TheAlgorithms/Javascript/blob/master/String/test/ReverseWords.test.js)
+ * [ValidateEmail](https://github.com/TheAlgorithms/Javascript/blob/master/String/ValidateEmail.js)
+ * [ValidateEmail](https://github.com/TheAlgorithms/Javascript/blob/master/String/ValidateEmail.test.js)
 
 ## Timing-Functions
  * [IntervalTimer](https://github.com/TheAlgorithms/Javascript/blob/master/Timing-Functions/IntervalTimer.js)