Put link on author for the same that demo

[Vctrsnts]

Hi,
First of all, congratulations on this design. I really like it because it's clear and leaves everything visible.

I'm trying to modify the author parameter so that it shows the same data as in the demo version where Powered by Hugo-blog-awsome appears, but as a link.
From what I've seen, this is done in the config.toml file under the author parameter. Is that correct?
If so, how can I add a link so that when clicked, it goes to the original theme page or do I have to do it by directly modifying the footer.html page?
I'm mentioning this because I've seen a parameter called footer.disclaimer, but I don't see where it can be configured.

Thank you if you could clarify this question for me.