match the version in readme.txt

Author: ilicfilip

progress-planner.php

@@ -7,7 +7,7 @@
  * Plugin name:       Progress Planner
  * Plugin URI:        https://prpl.fyi/home
  * Description:       A plugin to help you fight procrastination and get things done.
- * Requires at least: 6.6
+ * Requires at least: 6.7
  * Requires PHP:      7.4
  * Version:           1.9.0
  * Author:            Team Emilia Projects