message: Fix missing link in documentation causing `cargo doc` to fail
diff: @@ -496,6 +496,8 @@ impl SecretAgent {
  /// This should always panic rather than return an error.
  /// # Panics
  /// If any of the provided `protocols` are more than 255 bytes long.
  + ///
  + /// [RFC7301]: https://datatracker.ietf.org/doc/html/rfc7301
  pub fn set_alpn(&mut self, protocols: &[impl AsRef<str>]) -> Res<()> {
  // Validate and set length.
  let mut encoded_len = protocols.len();
  