small WordPress function that will change the Author URL displayed in posts to something else. Can be set to nearly any wordpress constant or filter that returns a URL.

awol_modify_author_link.php

// Add to functions.php, snippets plugin or a custom plugin
// Changes the URL attached to the Author name in a post. This prevents usernames being exposed as a URL in the post. Also useful if you do not use author archives

function awol_modify_author_link( $link ) {	 	 
    $link = esc_url(get_post_type_archive_link('post')); // this change be changed to a hardcoded URL or a WP filter/constant that returns a URL
    return $link;
}

add_filter( 'author_link', 'awol_modify_author_link', 10, 1 );