Copy compiled changelog to the tag's release notes
For example, https://gitlab.com/gitlab-org/gitlab-ee/tags/v9.5.5-ee would have the following release notes:
- [FIXED] Fix division by zero error in blame age mapping. !13803 (Jeff Stubler)
- [FIXED] Fix problems sanitizing URLs with empty passwords. !14083
- [FIXED] Fix a wrong `X-Gitlab-Event` header when testing webhooks. !14108
- [FIXED] Fixes the 500 errors caused by a race condition in GPG's tmp directory handling. !14194 (Alexis Reigel)
- [FIXED] Fix Pipeline Triggers to show triggered label and predefined variables (e.g. CI_PIPELINE_TRIGGERED). !14244
- [FIXED] Disable GitLab Project Import Button if source disabled.
- [FIXED] Fix project feature being deleted when updating project with invalid visibility level.
- [FIXED] Fix new navigation wrapping and causing height to grow.
- [FIXED] Normalize styles for empty state combo button.
- [FIXED] Fix buttons with different height in merge request widget.
- [FIXED] Fix broken svg in jobs dropdown for success status.
- [FIXED] Improve migrations using triggers.
- [CHANGED] Update the GPG verification semantics: A GPG signature must additionally match the committer in order to be verified. !13771 (Alexis Reigel)
- [OTHER] Fix repository equality check and avoid fetching ref if the commit is already available. This affects merge request creation performance. !13685
- [OTHER] Update documentation for confidential issue. !14117
- [FIXED] Fixes activation of project mirror when new project is created. !2756
- [FIXED] Geo - Whitelist LFS requests to download objects on a secondary node. !2758
- [FIXED] Fix unsetting credentials data for pull mirrors. !2810
- [FIXED] Fix a regression breaking projects with an empty import URL. !2824
- [FIXED] Fix a 500 error in the SSH host keys lookup action. !2827
- [FIXED] Ensure #route_setting is available before calling it. !2908
- [FIXED] Fix branch name regex not saving in /admin/push_rule config.
- [FIXED] Fix the gap in approvals in merge request widget.
- [FIXED] Fix merges not working when project is not licensed for squash.
- Don't put the password in the SSH remote if using public-key authentication. !2837
Note that for EE tags we probably want to show both the CE and EE changes in order to be comprehensive.