doc: add GPG fingerprint for chrisdickinson

PR-URL: #710
Reviewed-By: Rod Vagg <[email protected]>

Author: chrisdickinson

README.md

@@ -262,6 +262,7 @@ information about the governance of the io.js project, see
 * **Fedor Indutny** ([@indutny](https://github.com/indutny)) <[email protected]> (Technical Committee)
 * **Trevor Norris** ([@trevnorris](https://github.com/trevnorris)) <[email protected]> (Technical Committee)
 * **Chris Dickinson** ([@chrisdickinson](https://github.com/chrisdickinson)) <[email protected]> (Technical Committee)
+<br>Release GPG key: 9554F04D7259F04124DE6B476D5A82AC7E37093B
 * **Colin Ihrig** ([@cjihrig](https://github.com/cjihrig)) &lt;[email protected]&gt; (Technical Committee)
 * **Mikeal Rogers** ([@mikeal](https://github.com/mikeal)) &lt;[email protected]&gt;
 * **Rod Vagg** ([@rvagg](https://github.com/rvagg)) &lt;[email protected]&gt;