message: Fix doc lint by making URL in `utils.rs` a proper markdown URL
diff: @@ -76,7 +76,7 @@ impl Display for ResolveAddressErrorKind {
  }
  }
  -/// Backport of `Result::flatten`, see https://github.com/rust-lang/rust/issues/70142.
  +/// Backport of `Result::flatten`, see <https://github.com/rust-lang/rust/issues/70142>.
  pub trait FlattenResult {
  /// The output of the flattening operation.
  type Output;
  