Update changelog

Author: alexrudall

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Add Security.md and activate private vulnerability reporting
+- Add RealTime endpoint to create WebRTC token - thank you to [@ngelx](https://github.com/ngelx) for the PR and others for input!
 - Add multi-image upload - thank you to [@ryankon](https://github.com/ryankon) and others for requesting.
 - Handle OpenAI::Files request parameters - thank you to [@okorepanov](https://github.com/okorepanov) for the PR.