Add changelog entry for opentripplanner#7253 [ci skip]

Author: OTP Changelog Bot

doc/user/Changelog.md

@@ -93,6 +93,7 @@ based on merged pull requests. Search GitHub issues and pull requests for smalle
 - Accept integer values in Transmodel Cost scalar [#7315](https://github.com/opentripplanner/OpenTripPlanner/pull/7315)
 - Fix transport mode filter not applied on multi-mode patterns [#7275](https://github.com/opentripplanner/OpenTripPlanner/pull/7275)
 - Support for Siri ArrivalStatus.ARRIVED on EstimatedCalls [#7299](https://github.com/opentripplanner/OpenTripPlanner/pull/7299)
+- Fix memory leak in `TimetableSnapshot` related to `patternsForStop` and `realTimeAddedReplacedByTripOnServiceDateById` [#7253](https://github.com/opentripplanner/OpenTripPlanner/pull/7253)
 [](AUTOMATIC_CHANGELOG_PLACEHOLDER_DO_NOT_REMOVE)
 
 ## 2.8.1 (2025-09-22)