To create a new release, you will need to have unclog installed.
First, run:
unclog release vX.Y.Z --editor nano
This will move all the changelog entries from the unreleased folder into a new folder named after the release tag. It will also open an editor for you to write the release notes.
For the release notes, include the date (as in Date: October 15th, 2024). You can
optionally add a short summary of the release, but do not duplicate the changelog entries.
Then, regenerate the CHANGELOG by running
unclog build > CHANGELOG
Finally, commit and push the changes to the repo. The up-to-date changelog should be present on the release branch for the release you have just cut, and also on main.