Re-add skip govuk-account on subscribe button

Author: catalinailie

app/views/content_items/document_collection.html.erb

@@ -25,7 +25,7 @@
 <% if @content_item.taxonomy_topic_email_override_base_path.present? %>
   <%= render 'shared/taxon_signup_link', base_path: @content_item.taxonomy_topic_email_override_base_path %>
 <% else %>
-  <%= render 'shared/single_page_notification_button', content_item: @content_item %>
+  <%= render 'shared/single_page_notification_button', content_item: @content_item, skip_account: "true" %>
 <% end %>
 
 <div class="govuk-grid-row">