Generate Github release page

[lyz-code]

Description

The Github Action currently generates release only with the tag number information but nothing else.

Possible Solution

The Github Action could generate a detailed Github release page description with the contents of the changelog of that release.

Additional context

Compare commitizen releases with python-semantic-release ones.

Some users use the Watch releases to get updated on the evolution of the different software, so it's a nice way to share with your users your progress.

Thanks!

[lyz-code]

Opened a similar issue in the commitizen-action repository