udpates changelog

git-svn-id: http://svn.centreon.com/trunk/centreon@11834 6bcd3966-0018-0410-8128-fd23d134de7e

CHANGELOG

 ## Centreon 2.3.0-b3
 
+=> feature: Default settings can be set on Acknowledgement and Downtime forms (Host/Service Monitoring pages)
 => feature: New status filter on Host/Service Monitoring pages, no more submenus for filtering statuses
 => feature: Display Top and Secondary priority hosts on Host Monitoring Problem pages when there is host inheritance