Hi. Not sure I understand the question since the Release Notes page that you create contains all the changes for that release.
See https://extensions.xwiki.org/xwiki/bin/view/Extension/Release%20Notes%20Application/#HHomePage
BTW the app contains a demo too that you can install, see the last line in https://extensions.xwiki.org/xwiki/bin/view/Extension/Release%20Notes%20Application/#HPrerequisites26InstallationInstructions