Update expired link content

app/views/errors/download_link_expired.html.erb

@@ -1,7 +1,8 @@
-<% content_for :title, "Download link expired" %>
+<% content_for :title, "This link has expired" %>
 
 <div class="govuk-grid-row">
   <div class="govuk-grid-column-two-thirds">
-    <h1 class="govuk-heading-l">This link has expired</h1>
+    <h1 class="govuk-heading-xl govuk-!-margin-bottom-6">This link has expired.</h1>
+    <p class="govuk-body-m">Download the logs again to get a new link.</p>
   </div>
 </div>