message: typo fix connection-migration flag
diff: @@ -240,7 +240,7 @@ impl<Config: endpoint::Config> Manager<Config> {
  // TODO: This would be better handled as a stateless reset so the peer can terminate the
  // connection immediately. https://github.com/awslabs/s2n-quic/issues/317
  // We only enable connection migration for testing
  - #[cfg(not(any(feature = "connection_migration", feature = "testing", test)))]
  + #[cfg(not(any(feature = "connection-migration", feature = "testing", test)))]
  return Err(
  transport::Error::INTERNAL_ERROR.with_reason("Connection Migration is not supported")
  );
  