Nofollow link in user-question profile

Hello,
I'd like to know how to make nofollow the user website link in his profile-question page:

user-question.php archive
This lines:

<th><?php _e( 'Website', QA_TEXTDOMAIN ); ?></th>
<td><?php echo make_clickable( get_queried_object()->user_url ); ?></td>

How to do it nofollow?

Thank you,
Isabel