Updates queues instrumentation for python to use transaction set status

Author: edwardgou-sentry

docs/platforms/python/tracing/instrumentation/custom-instrumentation/queues-module.mdx

@@ -132,5 +132,5 @@ with sentry_sdk.start_transaction(transaction):
             process_message(message)
         except Exception:
             # In case of an error set the status to "internal_error"
-            span.set_status("internal_error")
+            transaction.set_status("internal_error")
 ```