doc: add Trott as collaborator

Author: Trott

README.md

@@ -326,6 +326,7 @@ information about the governance of the io.js project, see
 * **Ali Ijaz Sheikh** ([@ofrobots](https://github.com/ofrobots)) <ofrobots@google.com>
 * **Oleg Elifantiev** ([@Olegas](https://github.com/Olegas)) <oleg@elifantiev.ru>
 * **Domenic Denicola** ([@domenic](https://github.com/domenic)) <d@domenic.me>
+* **Rich Trott** ([@Trott](https://github.com/Trott)) <rtrott@gmail.com>
 
 Collaborators follow the [COLLABORATOR_GUIDE.md](./COLLABORATOR_GUIDE.md) in
 maintaining the io.js project.