added policy links to green-box notice on sign-in

app/views/devise/sessions/new.html.erb

@@ -8,7 +8,8 @@
 <% end %>
 
 <div class="notice is-info has-margin-bottom-4">
-  <i class="fas fa-info-circle"></i> Your sign-in information is the same on all communities on this network.
+  <p><i class="fas fa-info-circle"></i> Your sign-in information is the same on all communities on this network.</p>
+  <p>By signing in, you agree to abide by our <a href="/help/tos">Terms of Service</a>, <a href="/help/code-of-conduct">Code of Conduct</a>, <a href="/help/spam">Guidelines for promotional content</a>, and any other policies listed in the <a href="/help">Help Center</a>.</p>
 </div>
 
 <%= form_for(resource, as: resource_name, url: session_path(resource_name), method: :post) do |f| %>