fix typo

Author: smalyshev

NEWS

@@ -68,7 +68,7 @@ PHP                                                                        NEWS
   . Fixed bug #65268 (select() implementation uses outdated tick API). (Anatol)
 
 - Pgsql:
-  . Fixed bug #65336 (pg_escape_literal/identifier() scilently returns false).
+  . Fixed bug #65336 (pg_escape_literal/identifier() silently returns false).
     (Yasuo)
 
 18 Jul 2013, PHP 5.5.1