The "Releases" tab at https://plugins.jenkins.io/atlassian-bitbucket-server-integration/#releases lists the releases but does not say what is new in each release. That information is available in "ChangeLog" at the bottom of the "Documentation" tab https://plugins.jenkins.io/atlassian-bitbucket-server-integration/#documentation but it would be nice to have it in "Releases" like with other plugins. I believe the web page retrieves the release notes from GitHub releases in the plugin repository.