TP-2083 Style archive info link

[tapsal]

Actions for applying the changes locally

lando composer install && lando drush deploy

Testing instructions

• Make sure service has archive guide info shown.
• Go to "Work instructions" and schroll down to the archive info.
• Make sure its styles match the task: the link text is underlined and there's an arrow after that.

Review checklist

• The code conforms to Drupal coding standards.
• I have reviewed the code for security and quality issues.
• I have tested the code with the proper user roles.