Add NEWS entry

Author: derickr

NEWS

@@ -12,6 +12,10 @@ PHP                                                                        NEWS
     sapi/apache2handler/sapi_apache2.c). (nielsdos, ElliotNB)
   . Fixed bug GH-11028 (Heap Buffer Overflow in zval_undefined_cv.). (nielsdos)
 
+- Date:
+  . Fixed bug where the diff() method would not return the right result around
+    DST changeover for date/times associated with a timezone identifier. (Derick)
+
 - DOM:
   . Fixed bug #80602 (Segfault when using DOMChildNode::before()).
     (Nathan Freeman)