Fix constant reference

Author: joeldrapper

test/phlex/view/naughty_business.rb

@@ -157,7 +157,7 @@ def view_template
 		end
 	end
 
-	Phlex::SGML::UNSAFE_ATTRIBUTES.each do |event_attribute|
+	Phlex::SGML::Attributes::UNSAFE_ATTRIBUTES.each do |event_attribute|
 		with "with naughty #{event_attribute} attribute" do
 			naughty_attributes = { event_attribute => "alert(1);" }