[skip ci] update NEWS

Author: devnexen

NEWS

@@ -10,6 +10,13 @@ PHP                                                                        NEWS
   . Fixed bug GH-21566 (Dom\XMLDocument::C14N() emits duplicate xmlns
     declarations after setAttributeNS()). (David Carlier)
 
+- Iconv:
+  . Fixed bug GH-17399 (iconv memory leak on bailout). (iliaal)
+
+- Opcache:
+  . Fixed bug GH-21158 (JIT: Assertion jit->ra[var].flags & (1<<0) failed in
+    zend_jit_use_reg). (Arnaud)
+
 - SPL:
   . Fixed bug GH-21499 (RecursiveArrayIterator getChildren UAF after parent
     free). (Girgias)