Update Changelog.md instead of updateing the github release

[miikeat]

Is it possible to write the changelog to a file in the repo and commit it on the CI Server (manually or by the plugin) before creating the release instead of updating the Github release?

Simplest solution would be a seperate task which updates a changelog.md file that can be commited by the CI Server before running the release task. And only if the release task is successful the commit will be pushed.

Otherwise i would need to add yet another plugin to our build which might not use the same version retrieval logic.

I found e.g. this plugin https://github.com/marcpoppleton/gradle-changelog-plugin, but the Version 0.2.0 Changelog entry makes me a little concerned!