updating DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -710,6 +710,7 @@
   * [Validate Solutions](https://github.com/TheAlgorithms/Python/blob/master/project_euler/validate_solutions.py)
 
 ## Quantum
+  * [Deutsch Jozsa](https://github.com/TheAlgorithms/Python/blob/master/quantum/deutsch_jozsa.py)
   * [Half Adder](https://github.com/TheAlgorithms/Python/blob/master/quantum/half_adder.py)
   * [Not Gate](https://github.com/TheAlgorithms/Python/blob/master/quantum/not_gate.py)
   * [Quantum Entanglement](https://github.com/TheAlgorithms/Python/blob/master/quantum/quantum_entanglement.py)