Add NEWS entry

Author: bwoebi

NEWS

@@ -56,6 +56,7 @@
   . Fixed day_of_week function as it could sometimes return negative values
     internally. (Derick)
   . Removed $is_dst parameter from mktime() and gmmktime(). (Nikita)
+  . Removed date.timezone warning (https://wiki.php.net/rfc/date.timezone_warning_removal). (Bob)
 
 - DBA:
   . Fixed bug #62490 (dba_delete returns true on missing item (inifile)). (Mike)