doc: add trivikr to collaborators

trivikr is nominated as node core collaborator for his work on http2
https://github.com/nodejs/node/commits?author=trivikr

Refs: nodejs#19067

README.md

@@ -501,6 +501,8 @@ For more information about the governance of the Node.js project, see
 **Tobias Nießen** <tniessen@tnie.de>
 * [trevnorris](https://github.com/trevnorris) -
 **Trevor Norris** <trev.norris@gmail.com>
+* [trivikr](https://github.com/trivikr) -
+**Trivikram Kamat** <trivikr.dev@gmail.com>
 * [Trott](https://github.com/Trott) -
 **Rich Trott** <rtrott@gmail.com> (he/him)
 * [tunniclm](https://github.com/tunniclm) -