How to pass traceparent to celery task for celery instrument?

[hlin]

https://github.com/open-telemetry/opentelemetry-python-contrib/blob/main/instrumentation/opentelemetry-instrumentation-celery/src/opentelemetry/instrumentation/celery/__init__.py#L155-L156

        request = task.request
        tracectx = extract(request, getter=celery_getter) or None

CeleryInstrumentor extracts ctx from task.request, but task.request does not have the attribute traceparent https://docs.celeryq.dev/en/stable/userguide/tasks.html#task-request, anyone know how to pass traceparent to task.request?