Update CHANGELOG.md

Co-authored-by: Kris West <kris.west@interop.io>

Author: Roaders

CHANGELOG.md

@@ -50,7 +50,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 * Setup package publishing for mono-repo packages. ([#1520](https://github.com/finos/FDC3/pull/1520))
 * Implementation PR for FDC3 for the Web ([#896](https://github.com/finos/FDC3/pull/896))
 * Adjusted reference Desktop Agent implementation for FDC3 for Web to open a new app instance when raiseIntent is called with an appId but no instanceId ([#1556](https://github.com/finos/FDC3/pull/1556))
-* Added `addIntentWithContextListener` to `DesktopAgent` and implemented in `DesktopAgentProxy`
+* Added `addIntentListenerWithContext` to `DesktopAgent` and implemented in `DesktopAgentProxy`. Added handling of optional `contextTypes` to reference implementation
 
 ### Changed