fix(tracing): activate distributed headers in the rq integration

This was forgotten in 9a5fd14.

Author: juzna

ddtrace/contrib/internal/rq/patch.py

@@ -112,6 +112,7 @@ def traced_perform_job(rq, pin, func, instance, args, kwargs):
             resource=job.func_name,
             integration_config=config.rq_worker,
             distributed_headers=job.meta,
+            activate_distributed_headers=True,
             tags={COMPONENT: config.rq.integration_name, SPAN_KIND: SpanKind.CONSUMER, JOB_ID: job.get_id()},
         ) as ctx, ctx.span:
             try: