Add changelog entry for Mattermost v6.7
- Mattermost version 6.7 has been deployed, hence a changelog entry need to be added.
The Helmholtz Codebase and Mattermost will not be available between May 2nd, 16:15 and May 2nd, 17:45. In preparation of the GitLab major upgrade 17.0 a database maintenance is required.
Please subscribe to service-announcement@hifis.net if you would like to receive regular information on HIFIS service announcements via email.