message: fix(http2): fix import of h2::Reason to work on 1.26
diff: @@ -145,7 +145,7 @@ where
  debug!("service closed: {}", err);
  let reason = err.h2_reason();
  - if reason == h2::Reason::NO_ERROR {
  + if reason == Reason::NO_ERROR {
  // NO_ERROR is only used for graceful shutdowns...
  trace!("interpretting NO_ERROR user error as graceful_shutdown");
  self.conn.graceful_shutdown();
  