reword warning about unsupported cakephp version

Author: josbeir

docs/en/index.md

@@ -1,7 +1,7 @@
 # Welcome
 
 ::: warning Unsupported Version
-You are viewing documentation for an **unsupported version** of CakePHP. For the most recent stable version, please visit the [official documentation](https://book.cakephp.org/).
+You are viewing documentation for a **previous version** of CakePHP. For the most recent stable version, please visit the [official documentation](https://book.cakephp.org/).
 :::
 
 CakePHP 4 is a web development framework running on PHP |phpversion| (min. PHP |minphpversion|). Read [CakePHP at a Glance](intro) to get an introduction to the fundamentals of CakePHP.