message: Fix doc link for `hash_merkle_tree`
diff: @@ -116,7 +116,7 @@ impl Digest {
  Digest(result)
  }
  - /// Provides the same functionality as [`hash_merkle_tree`].
  + /// Provides the same functionality as [`Digest::hash_merkle_tree`].
  #[deprecated(since = "1.5.0", note = "use `hash_merkle_tree` instead")]
  pub fn hash_vec_merkle_tree(vec: Vec<Digest>) -> Digest {
  Digest::hash_merkle_tree(vec)
  