message: Fix panorama mismatch error log.
diff: @@ -651,13 +651,12 @@ impl<I: NodeIdT, C: Context + 'static> HighwayProtocol<I, C> {
  error!(?vid, "received a request for non-existing validator");
  vec![]
  }
  - Some(latest_obs) => match latest_obs {
  + Some(observation) => match observation {
  Observation::None | Observation::Faulty => {
  - let index_panorama = format!("Count({:?})", our_count.saturating_sub(1));
  error!(
  ?vid,
  - ?index_panorama,
  - panorama=?latest_obs,
  + our_count,
  + ?observation,
  "`IndexPanorama` doesn't match `state.panorama` for validator"
  );
  vec![]
  