Auto-update DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -11,6 +11,7 @@
 ## Bit-Manipulation
  * [BinaryCountSetBits](https://github.com/TheAlgorithms/Javascript/blob/master/Bit-Manipulation/BinaryCountSetBits.js)
  * [IsPowerOfTwo](https://github.com/TheAlgorithms/Javascript/blob/master/Bit-Manipulation/IsPowerOfTwo.js)
+ * [NextPowerOfTwo](https://github.com/TheAlgorithms/Javascript/blob/master/Bit-Manipulation/NextPowerOfTwo.js)
  * [SetBit](https://github.com/TheAlgorithms/Javascript/blob/master/Bit-Manipulation/SetBit.js)
 
 ## Cache