Add NEWS entry

And fix previous entry

Author: kocsismate

NEWS

@@ -3,8 +3,10 @@ PHP                                                                        NEWS
 ?? ??? ????, PHP 8.4.0RC4
 
 - PDO:
-  . Fixed bug GH-16167 (Prevent mixing PDO sub-classes with different DSN).
+  . Fixed bug GH-16131 (Prevent mixing PDO sub-classes with different DSN).
   (kocsismate)
+  . Fixed bug GH-16314 ("Pdo\Mysql object is uninitialized" when opening a
+  persistent connection). (kocsismate)
 
 24 Oct 2024, PHP 8.4.0RC3