Ticket #40151: 40151#.patch

src/wp-admin/includes/meta-boxes.php

@@ -651 +651 @@
         printf(
                 /* translators: %s: Codex URL */
                 __( 'Custom fields can be used to add extra metadata to a post that you can <a href="%s">use in your theme</a>.' ),
-                __( 'https://codex.wordpress.org/Using_Custom_Fields' )
+                __( 'https://codex.wordpress.org/Custom_Fields' )
         );
 ?></p>
 <?php