fix html escaping for UTF-8 module metadata

data/markdown_doc/default_template.erb

@@ -5,7 +5,7 @@
 
 ## Module Name
 
-<%= Rex::Text.html_encode(items[:mod_fullname]) %>
+<%= CGI::escapeHTML(items[:mod_fullname]) %>
 
 ## Authors
 

lib/msf/util/document_generator/normalizer.rb

@@ -183,7 +183,7 @@ module Msf
         # @return [String]
         def normalize_authors(authors)
           if authors.kind_of?(Array)
-            authors.collect { |a| "* #{Rex::Text.html_encode(a)}" } * "\n"
+            authors.collect { |a| "* #{CGI::escapeHTML(a)}" } * "\n"
           else
             authors
           end