doc: add firedfox to collaborators

PR-URL: #6961
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: firedfox

README.md

@@ -175,6 +175,7 @@ information about the governance of the Node.js project, see
 * [domenic](https://github.com/domenic) - **Domenic Denicola** <d@domenic.me>
 * [eljefedelrodeodeljefe](https://github.com/eljefedelrodeodeljefe) - **Robert Jefe Lindstaedt** <robert.lindstaedt@gmail.com>
 * [estliberitas](https://github.com/estliberitas) - **Alexander Makarenko** <estliberitas@gmail.com>
+* [firedfox](https://github.com/firedfox) - **Daniel Wang** <wangyang0123@gmail.com>
 * [geek](https://github.com/geek) - **Wyatt Preul** <wpreul@gmail.com>
 * [iarna](https://github.com/iarna) - **Rebecca Turner** <me@re-becca.org>
 * [isaacs](https://github.com/isaacs) - **Isaac Z. Schlueter** <i@izs.me>