updating documentation link

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34068 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/uri/common.rb

@@ -859,7 +859,7 @@ module URI
   # (ASCII space) to + and converts others to %XX.
   #
   # This is an implementation of
-  # http://www.w3.org/TR/html5/forms.html#url-encoded-form-data
+  # http://www.w3.org/TR/html5/association-of-controls-and-forms.html#url-encoded-form-data
   #
   # See URI.decode_www_form_component, URI.encode_www_form
   def self.encode_www_form_component(str)