Fix EE note blow sign-in form

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/layouts/devise.html.haml

@@ -13,5 +13,5 @@
             #{link_to "Sign in", new_user_session_path} or browse for #{link_to "public projects", public_projects_path}.
         %hr
         = yield
-        %center
-          %h5.cwhite Enterprise Edition
+        %center.prepend-top-20
+          %h6 Enterprise Edition