Updated changelog for strtotime's relative week changes. Fixes bug #52143.

This affects Derick's commits for 357292a098f572bc7baf11a8438314072af6c00b and 089bc254eb33b3c42418f869f2478ce35558c9ea in PHP 5.3, which change this behavior.


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@329158 c90b9560-bf6c-de11-be94-00142212c4b1