benchmark: fix typo in README
benchmark: fix typo in README

PR-URL: https://github.com/nodejs/io.js/pull/2067
Reviewed-By: Brian White <d8bbf19083844493ef08581d1c38fbc50ba5d18b@mscdex.net>
Reviewed-By: Jeremiah Senkpiel <f1782d15e31ad502ea2c097c21cc235811d0cb7c@rocketmail.com>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node