Update NEWS/UPGRADING for destructing non-array values

Author: Girgias

NEWS

@@ -2,6 +2,10 @@ PHP                                                                        NEWS
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 ?? ??? ????, PHP 8.5.0beta3
 
+- Core:
+  . Destructing non-array values (other than NULL) using [] or list() now
+    emits a warning. (Girgias)
+
 - Opcache:
   . Fixed bug GH-19486 (Incorrect opline after deoptimization). (Arnaud)
 

UPGRADING

@@ -52,6 +52,9 @@ PHP 8.5 UPGRADE NOTES
   . The disable_classes INI setting has been removed as it causes various
     engine assumptions to be broken.
     RFC: https://wiki.php.net/rfc/deprecations_php_8_5#remove_disable_classes_ini_setting
+  . Destructing non-array values (other than NULL) using [] or list() now
+    emits a warning.
+    RFC: https://wiki.php.net/rfc/warnings-php-8-5#destructuring_non-array_values
 
 - BZ2:
   . bzcompress() now throws a ValueError when $block_size is not between