Update README

Author: chronon

README.md

@@ -1,4 +1,4 @@
-# SvgIcon plugin for CakePHP 4.x
+# SvgIcon plugin for CakePHP 5.x
 
 ![Build Status](https://github.com/loadsys/cakephp-svg-icon/actions/workflows/ci.yml/badge.svg?branch=main)
 
@@ -14,6 +14,11 @@ The recommended way to install composer packages is:
 composer require loadsys/cakephp-svg-icon
 ```
 
+## Versions
+
+* Tags `1.x` are for CakePHP v4.x.
+* Tags `2.x` are for CakePHP v5.x.
+
 ## Configuration
 
 Icons should be added to `config/app_svg_icon.php` - see the example included in `config` directory for the expected format. Any SVG icon should work, such as [heroicons](https://heroicons.com) or [Bootstrap Icons](https://icons.getbootstrap.com).