message: chore: log header_map memory_limit
diff: @@ -1144,6 +1144,10 @@ impl SyncShared {
  )
  };
  let shared_best_header = RwLock::new(HeaderView::new(header, total_difficulty));
  + ckb_logger::info!(
  + "header_map.memory_limit {}",
  + sync_config.header_map.memory_limit
  + );
  let header_map = HeaderMap::new(
  tmpdir,
  sync_config.header_map.memory_limit.as_u64() as usize,
  