updated changelog

Author: LPLafontaineB

CHANGELOG.md

@@ -9,7 +9,8 @@ Additional documentation and release notes are available at [Multiplayer Documen
 ## [Unreleased] - yyyy-mm-dd
 
 ### Added
-*
+* Added handling the OnTransportFailure callback (#707)
+
 ### Changed
 * Updated tools, authentication and relay packages (#690)
 * Replaced our dependency injection solution with VContainer. (#679)