4992: Updated changelog

Author: tuj

CHANGELOG.md

@@ -4,6 +4,9 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+- [#260](https://github.com/os2display/display-api-service/pull/260)
+  - Changed how exceptions are handled in InstantBook.
+
 ## [2.5.1] - 2025-06-23
 
 - [#245](https://github.com/os2display/display-api-service/pull/245)