message: Add missing continue to pull consumer heartbeat
diff: @@ -536,6 +536,7 @@ impl futures::Stream for Stream {
  continue;
  }
  StatusCode::IDLE_HEARBEAT => {}
  + continue;
  StatusCode::OK => {
  self.pending_messages = self.pending_messages.saturating_sub(1);
  return Poll::Ready(Some(Ok(jetstream::Message {
  