* fix: upgrading celery version and fixing tests. --------- Co-authored-by: edX requirements bot <49161187+edx-requirements-bot@users.noreply.github.com> Co-authored-by: zubairshakoorarbisoft <zubair.shakoor@arbisoft.com> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: awais786 <awais786@users.noreply.github.com>