Content change to CSV reference docs (#4929)

app/views/csv_docs/pages/add_trainees.html.erb

@@ -4,12 +4,14 @@
 ) %>
 
 <p class="govuk-body">
-  Training providers can register their trainees in bulk by creating trainee records and adding the required data.
+  <%= render(NotificationBanner::View.new(
+    text: "This draft guidance is for review and testing purposes only. Send your feedback or questions to <a href=\"mailto:[email protected]\" class=\"govuk-notification-banner__link\">[email protected]</a>.".html_safe,
+    type: :important,
+  )) %>
 </p>
 
-<h2 class="govuk-heading-m">Important</h2>
 <p class="govuk-body">
-  This draft guidance is for review and testing purposes only. Send your feedback or questions to <a href="mailto:[email protected]" class="govuk-link">[email protected]</a>.
+  Training providers can register their trainees in bulk by creating trainee records and adding the required data.
 </p>
 
 <p class="govuk-body">