Auto-update DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -153,6 +153,7 @@
  * [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)
+ * [FermatPrimalityTest](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/FermatPrimalityTest.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)