more module upgrade notes

mod/upgrade.txt

@@ -34,7 +34,8 @@ required changes in code:
   (http://docs.moodle.org/en/Development:Theme_changes_in_2.0)
 * migrate all javascript new coding style using YUI3+YUI2
   (http://docs.moodle.org/en/Development:JavaScript_usage_guide)
-
+* remove '_utf8' from lang pack names, use new {a} syntax
+* replace helps with new 'xxx_hlp' strings
 
 optional - no changes needed in older code:
 * support for new mforms editor element and embedded files