message: Address comment: fix copy paste bug.
diff: @@ -250,7 +250,7 @@ void Context::onStatsUpdate(Envoy::Stats::MetricSnapshot& snapshot) {
  for (const auto& gauge : snapshot.gauges()) {
  if (gauge.get().used()) {
  gauge_block_size += sizeof(uint32_t) + gauge.get().name().size();
  - gauge_block_size += align<uint64_t>(counter_block_size + sizeof(uint64_t));
  + gauge_block_size += align<uint64_t>(gauge_block_size + sizeof(uint64_t));
  }
  }
  