message: refactor: Resolve App::usage deprecation
diff: @@ -416,7 +416,7 @@ fn cli() -> App {
  // Doesn't mix well with our list of common cargo commands. See clap-rs/clap#3108 for
  // opening clap up to allow us to style our help template
  .global_setting(AppSettings::DisableColoredHelp)
  - .usage(usage)
  + .override_usage(usage)
  .template(
  "\
  Rust's package manager
  