Upgrade/Install: Update the $_old_files array for 6.9.

Props SergeyBiryukov, davidbaumwald.
Fixes #64320.


git-svn-id: https://develop.svn.wordpress.org/trunk@61338 602fd350-edb4-49c9-b593-d223f7449a82

Author: dream-encode

src/wp-admin/includes/update-core.php

@@ -841,6 +841,12 @@
 	'wp-includes/js/dist/undo-manager.min.js',
 	'wp-includes/js/dist/fields.min.js',
 	'wp-includes/js/dist/fields.js',
+	// 6.9
+	'wp-includes/blocks/post-author/editor.css',
+	'wp-includes/blocks/post-author/editor.min.css',
+	'wp-includes/blocks/post-author/editor-rtl.css',
+	'wp-includes/blocks/post-author/editor-rtl.min.css',
+	'wp-includes/SimplePie/src/Decode',
 );
 
 /**