Externalize strings of group edit page

What does this MR do?

Externalize strings of group edit page. Port from CE, see MR gitlab-org/gitlab-ce!32090.

app/views/shared/_confirm_modal.html.haml

@@ -13,7 +13,7 @@
           %span.js-warning-text= _('This action can lead to data loss. To prevent accidental actions we ask you to confirm your intention.')
           %br
             - phrase_code = '<code class="js-confirm-danger-match">%{phrase_name}</code>'.html_safe % { phrase_name: phrase }
-            = _('Please type %{phrase_code} to proceed or close this modal to cancel.').html_safe % {phrase_code: phrase_code}
+            = _('Please type %{phrase_code} to proceed or close this modal to cancel.').html_safe % { phrase_code: phrase_code }
 
         .form-group
           = text_field_tag 'confirm_name_input', '', class: 'form-control js-confirm-danger-input qa-confirm-input'