Auto-update DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -155,6 +155,7 @@
   * [EulerMethod](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/EulerMethod.js)
   * [EulersTotient](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/EulersTotient.js)
   * [EulersTotientFunction](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/EulersTotientFunction.js)
+  * [ExtendedEuclideanGCD](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/ExtendedEuclideanGCD.js)
   * [Factorial](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/Factorial.js)
   * [Factors](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/Factors.js)
   * [FareyApproximation](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/FareyApproximation.js)