Add changelog entry for #5468 [ci skip]

Author: OTP Changelog Bot

docs/Changelog.md

@@ -36,6 +36,7 @@ based on merged pull requests. Search GitHub issues and pull requests for smalle
 - Calculate CO₂ emissions of itineraries [#5278](https://github.com/opentripplanner/OpenTripPlanner/pull/5278)
 - Update NeTEx Java Model 2.0.15 [#5466](https://github.com/opentripplanner/OpenTripPlanner/pull/5466)
 - Migrate to Java 21 [#5421](https://github.com/opentripplanner/OpenTripPlanner/pull/5421)
+- Add Roadmap setup docs [#5468](https://github.com/opentripplanner/OpenTripPlanner/pull/5468)
 [](AUTOMATIC_CHANGELOG_PLACEHOLDER_DO_NOT_REMOVE)
 
 ## 2.4.0 (2023-09-13)