Add changelog entry for opentripplanner#7324 [ci skip]

Author: OTP Changelog Bot

doc/user/Changelog.md

@@ -97,6 +97,7 @@ based on merged pull requests. Search GitHub issues and pull requests for smalle
 - Move `StreetSearchBuilder` to street module [#7328](https://github.com/opentripplanner/OpenTripPlanner/pull/7328)
 - Mark RecordedCall without ActualDepartureTime as not departed [#7336](https://github.com/opentripplanner/OpenTripPlanner/pull/7336)
 - Update to Java 25 [#7246](https://github.com/opentripplanner/OpenTripPlanner/pull/7246)
+- Reject SIRI messages with missing Order attribute on calls [#7324](https://github.com/opentripplanner/OpenTripPlanner/pull/7324)
 [](AUTOMATIC_CHANGELOG_PLACEHOLDER_DO_NOT_REMOVE)
 
 ## 2.8.1 (2025-09-22)