Addressed comments: Added sample config in the docs as well as refere…

…nce link for all the celery configs.

providers/src/airflow/providers/celery/provider.yaml

@@ -332,7 +332,9 @@ config:
         default: "False"
       extra_celery_config:
         description: |
-          Extra celery configs to include in the celery worker. Any of the celery config can be added to this config and it will be applied while starting the celery worker. e.g. {"worker_max_tasks_per_child": 10}
+          Extra celery configs to include in the celery worker.
+          Any of the celery config can be added to this config and it
+          will be applied while starting the celery worker. e.g. {"worker_max_tasks_per_child": 10}
           See also:
           https://docs.celeryq.dev/en/stable/userguide/configuration.html#configuration-and-defaults
         version_added: ~