doc: add RaisinTen as a triager

I would like to apply for the role of a triager in this project.
My motivation to become a triager is to help with the issues in
this repo and the help repo, as well as learn deeper internals
of Node.js, and to eventually become a collaborator!
I hearby declare that I have read and understood the Code of
Conduct of the project and will adhere to that.

PR-URL: #36404
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: RaisinTen

README.md

@@ -574,6 +574,8 @@ maintaining the Node.js project.
 
 * [PoojaDurgad](https://github.com/PoojaDurgad) -
 **Pooja Durgad** <Pooja.D.P@ibm.com>
+* [RaisinTen](https://github.com/RaisinTen) -
+**Darshan Sen** <raisinten@gmail.com>
 
 ### Release Keys