Add svetlanabrennan as an approver (#3182)

Co-authored-by: Daniel Dyla <dyladan@users.noreply.github.com>

README.md

@@ -186,7 +186,7 @@ Approvers ([@open-telemetry/js-approvers](https://github.com/orgs/open-telemetry
 - [Naseem K. Ullah](https://github.com/naseemkullah), Transit
 - [Neville Wylie](https://github.com/MSNev), Microsoft
 - [Olivier Albertini](https://github.com/OlivierAlbertini), Ville de Montréal
-- [Rauno Viskus](https://github.com/Rauno56), Splunk
+- [Svetlana Brennan](https://github.com/svetlanabrennan), New Relic
 
 *Find more about the approver role in [community repository](https://github.com/open-telemetry/community/blob/main/community-membership.md#approver).*