message: QNS client: Re-add sleep to client runs
  We're seeing "connection refused" errors. wait-for-it doesn't seem to ever
  be waiting.
  We need to re-add the sleep for now.
diff: @@ -13,6 +13,7 @@ if [ "$ROLE" == "client" ]; then
  echo "Starting Neqo client ..."
  echo "CLIENT_PARAMS: ${CLIENT_PARAMS[*]}"
  echo "REQUESTS: $REQUESTS"
  + sleep 5
  RUST_LOG=debug RUST_BACKTRACE=1 ./target/neqo-client "${CLIENT_PARAMS[@]}" $REQUESTS
  elif [ "$ROLE" == "server" ]; then
  RUST_LOG=info RUST_BACKTRACE=1 ./target/neqo-http3-server "${SERVER_PARAMS[@]}"
  