message: Update `fetch_trie` docs
diff: @@ -1258,6 +1258,8 @@ impl<REv> EffectBuilder<REv> {
  }
  /// Requests a trie node from a peer.
  + ///
  + /// `peers` must be a **non-empty** set of peers to fetch from.
  pub(crate) async fn fetch_trie(self, hash: Digest, peers: Vec<NodeId>) -> TrieFetcherResult
  where
  REv: From<TrieFetcherRequest>,
  