Publish a release

Publication procedure

• Copy changelog from Wiki to new page
• Update .github/PULL_REQUEST_TEMPLATE.md to point to a new changelog wiki page
• Replace #([0-9][0-9][0-9][0-9]) with [#$1](https://github.com/ufz/ogs/pull/$1) (e.g. in VS Code)
• Tag the release commit as an annotated tag (git tag -a 6.0.8 -m "OpenGeoSys Release 6.0.8")
• Create a new release on GitHub
• Fill in the release notes from the Wiki
• Start the ufz/master Jenkins job manually and check that it ran successfully! (Do not push to master until job ran successfully!)
• Copy release binaries from Jenkins job to GitHub release page
• Create and copy container images to GitHub release page
• Update web release page with generated artifacts
• Check new Zenodo release
• Create a discourse announcement post