Simplify workflow setup for git commit

[amclin]

I would recommend simplifying the setup with a GitHub action for committing instead of recommending people create and store SSH keys:

https://github.com/marketplace/actions/git-auto-commit

[J0B10]

Yeah I agree I should have used git auto commit. Also the SSH key is not really needed even with the current config, as the token stored in GITHUB_TOKEN secret already has the needed permissions.

I did not knew that back when I created the action.