[ci skip] UPGRADING

GH-10149

UPGRADING

@@ -65,6 +65,9 @@ PHP 8.3 UPGRADE NOTES
 - Standard:
   . E_NOTICEs emitted by unserialized() have been promoted to E_WARNING.
     RFC: https://wiki.php.net/rfc/improve_unserialize_error_handling
+  . array_pad() is now only limited by the maximum number of elements an array
+    can have. Before, it was only possible to add at most 1048576 elements at a
+    time.
 
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 6. New Functions