message: qlog: Log more congestion window updates
  Not seeing these updates in the log is very confusing.
diff: @@ -178,6 +178,11 @@ impl CongestionControl {
  {
  if last_lost_pkt.time_sent.duration_since(first.time_sent) > congestion_period {
  self.congestion_window = MIN_CONG_WINDOW;
  + qlog::metrics_updated(
  + &mut self.qlog,
  + &[QlogMetric::CongestionWindow(self.congestion_window)],
  + );
  +
  qinfo!([self], "persistent congestion");
  }
  }
  @@ -254,6 +259,7 @@ impl CongestionControl {
  qlog::metrics_updated(
  &mut self.qlog,
  &[
  + QlogMetric::CongestionWindow(self.congestion_window),
  QlogMetric::SsThresh(self.ssthresh),
  QlogMetric::InRecovery(true),
  ],
  