Fix plain text template

app/views/notify/pages_domain_auto_ssl_failed_email.text.haml

 = _("Something went wrong while obtaining the Let's Encrypt certificate.")
 
-#{_('Project')}: #{link_to @project.human_name, project_url(@project)}
-#{_('Domain')}: #{link_to @domain.domain, project_pages_domain_url(@project, @domain)}
+#{_('Project')}: #{project_url(@project)}
+#{_('Domain')}: #{project_pages_domain_url(@project, @domain)}
 
 - docs_url = help_page_url('user/project/pages/custom_domains_ssl_tls_certification/lets_encrypt_integration.md', anchor: 'troubleshooting')
-- link_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: docs_url }
-- link_end = '</a>'.html_safe
-= _("Please follow the %{link_start}Let\'s Encrypt troubleshooting instructions%{link_end} to re-obtain your Let's Encrypt certificate.").html_safe % { link_start: link_start, link_end: link_end }
+= _("Please follow the Let\'s Encrypt troubleshooting instructions to re-obtain your Let's Encrypt certificate: %{docs_url}.").html_safe % { docs_url: docs_url }