add missing NEWS entry

Author: Tyrael

NEWS

@@ -1,11 +1,16 @@
 PHP                                                                        NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
-?? ??? 2016, PHP 5.6.22
+?? ??? 2016, PHP 5.6.23
 
- - Core:
+26 May 2016, PHP 5.6.22
+
+- Core:
   . Fixed bug #72172 (zend_hex_strtod should not use strlen).
     (bwitz at hotmail dot com )
 
+- Intl
+  . Fixed bug #64524 (Add intl.use_exceptions to php.ini-*). (Anatol)
+
 - Postgres:
   . Fixed bug #72151 (mysqli_fetch_object changed behaviour). (Anatol)