updating DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -138,6 +138,7 @@
   * [EulersTotientFunction](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/EulersTotientFunction.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)
   * [Fibonacci](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/Fibonacci.js)
   * [FindHcf](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/FindHcf.js)
   * [FindLcm](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/FindLcm.js)
@@ -180,6 +181,7 @@
     * [EulersTotientFunction](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/EulersTotientFunction.test.js)
     * [Factorial](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/Factorial.test.js)
     * [Factors](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/Factors.test.js)
+    * [FareyApproximation](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/FareyApproximation.test.js)
     * [Fibonacci](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/Fibonacci.test.js)
     * [FindHcf](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/FindHcf.test.js)
     * [FindLcm](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/test/FindLcm.test.js)