Update Celery commands in docker-compose.yml

[catherinek07]

Updating the Celery commands in the docker-compose.yml file for celery version 5.3.5.

Changes:

• For the "beat" service, the command has been updated to celery -A celeryconf beat -l info.
• For the "cron worker" service, the command has been updated to celery -A celeryconf worker -l info -c 4 -n cron@%h -Q cron.
• For the "celery worker" service, the command has been updated tocelery -A celeryconf worker -l info -n worker@%h -Q celery.

[community-tc-integration[bot]]

No Taskcluster jobs started for this pull request

The `allowPullRequests` configuration for this repository (in `.taskcluster.yml` on the
default branch) does not allow starting tasks for this pull request.