Fix failing build due to missing requirement (#8900)

* feat(cellular_automata): Create wa-tor algorithm

* updating DIRECTORY.md

* chore(quality): Implement algo-keeper bot changes

* build: Fix broken ci

* git rm cellular_automata/wa_tor.py

* updating DIRECTORY.md

---------

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: Christian Clauss <cclauss@me.com>

Author: 3 people

requirements.txt

@@ -9,6 +9,7 @@ pandas
 pillow
 projectq
 qiskit
+qiskit-aer
 requests
 rich
 scikit-fuzzy