[Docs] Include changes in Github release body

[cdce8p]

Summary

Not entirely sure if it's possible with the automated release workflow.

It would be nice if the version changes could be listed in the Github release body. Github offers the option to subscribe just to releases. With that it would be easier to see the changes directly.

OS / Environment

No response

Additional Information

An alternative would be to include a link to CHANGES.rst.

Code of Conduct

• I agree to follow the PSF Code of Conduct

[abravalheri]

This issue is related to #2892 (newer, but there is some discussion going on there).