yarn: clean all styles

lib/docs/filters/yarn/clean_html_berry.rb

@@ -34,10 +34,13 @@ module Docs
         if slug.start_with?('configuration')
           css('h1', 'h2').each do |node|
             node.name = node.name.sub(/\d/) { |i| i.to_i + 1 }
-            node.remove_attribute('style')
           end
         end
 
+        css('*').each do |node|
+          node.remove_attribute('style')
+        end
+
         doc
       end
     end