How are Releases related to Changes?
Release Management can be effectively used to coordinate releases as a vehicle for planning releases, composed of individual work items such as, projects, epics, stories, and problems. After the release scope (projects, stories, and so on) is finalized, you can generate Change Items and associate them to the release, allowing the implementation and deployment of a release to be handled within the change management process.
https://www.servicenow.com/docs/bundle/yokohama-it-service-management/page/product/release-management/concept/c_ITILReleaseManagement.html