message: sort sub-benchmarks by name
diff: @@ -308,10 +308,11 @@ impl Report for Html {
  .file_name()
  .map(|name| name.to_string_lossy())
  .unwrap();
  - let sub_benchmarks = fs::list_existing_reports(&base_dir)?
  + let mut sub_benchmarks = fs::list_existing_reports(&base_dir)?
  .into_iter()
  .map(|sub_path| path_to_individual_benchmark(&sub_path, output_directory))
  .collect::<Result<Vec<_>>>()?;
  + sub_benchmarks.sort_unstable_by_key(|k| k.name.clone());
  Ok(IndexBenchmark {
  name: name.to_string(),
  path: path.join("index.html")
  