How to link to different 'about' pages for different authors?

I found this post a few months ago which contained this code for changing the author link to a custom 'about' page:

add_filter( 'author_link', 'my_author_link' );

function my_author_link() {
	return home_url( '/about/' );
}

This worked perfectly, but now my site is about to have additional authors for the first time, so I need to do this same thing but with a different 'about' page for each different author.

Any help would be greatly appreciated. Thanks!