message: Update out of date comments in aws-hyper lib
diff: @@ -127,10 +127,14 @@ where
  // Create a new request-scoped policy
  .retry(self.retry_handler.new_handler())
  .layer(ParseResponseLayer::<O, Retry>::new())
  + // These layers can be considered as occuring in order, that is:
  + // 1. Resolve an endpoint
  + // 2. Add a user agent
  + // 3. Sign
  + // 4. Dispatch over the wire
  .layer(endpoint_resolver)
  .layer(user_agent)
  .layer(signer)
  - // Apply the user agent _after signing_. We should not sign the user-agent header
  .layer(DispatchLayer::new())
  .service(inner);
  svc.ready().await?.call(input).await
  