Bump tested up to to 6.9

Co-authored-by: Steve Jones <steve@stevejonesdev.com>

Author: pattonwebz

readme.txt

@@ -2,7 +2,7 @@
 Contributors: equalizedigital, alh0319, stevejonesdev
 Tags: accessibility, accessible, wcag, ada, WP accessibility
 Requires at least: 6.6
-Tested up to: 6.8
+Tested up to: 6.9
 Stable tag: 1.35.0
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html