update compatibility with WordPress 6.7

Author: threadi

readme.txt

@@ -2,7 +2,7 @@
 Contributors: threadi
 Tags: category, auto category, posts
 Requires at least: 5.8
-Tested up to: 6.6
+Tested up to: 6.7
 Requires PHP: 7.4
 License: GPL-2.0-or-later
 License URI: https://www.gnu.org/licenses/gpl-2.0.html