update changelog

CHANGELOG.md

@@ -26,6 +26,7 @@ Ansible Changes By Release
 * with_items no longer creates lots of tasks, creates one task that makes multiple calls
 * can use host_specific facts inside with_items (see above)
 * at the top level of a playbook, set 'gather_facts: False' to skip fact gathering
+* first_available_file and with_items used together will now raise an error
 
 0.5 "Amsterdam" ------- July 04, 2012