Update CSS documentation

Author: simon04

lib/docs/filters/mdn/clean_html.rb

@@ -72,6 +72,8 @@ def call
           node.remove_attribute('class')
         end
 
+        css('.example-header').remove
+
         css('table').each do |node|
           node.before %(<div class="_table"></div>)
           node.previous_element << node

lib/docs/scrapers/mdn/css.rb

@@ -1,6 +1,6 @@
 module Docs
   class Css < Mdn
-    # release = '2024-08-20'
+    # release = '2024-11-17'
     self.name = 'CSS'
     self.base_url = 'https://developer.mozilla.org/en-US/docs/Web/CSS'
     self.root_path = '/Reference'

public/icons/docs/css/16.png

@@ -0,0 +1,2 @@
+https://github.com/CSS-Next/logo.css
+https://commons.wikimedia.org/wiki/File:Official_CSS_Logo.svg