Update plugin_class_error.php changed url CakePHP 4 to 5

templates/element/plugin_class_error.php

@@ -25,7 +25,7 @@ if (!Plugin::isLoaded($plugin)):
 else:
     echo sprintf('Make sure your plugin was loaded from %s and Composer is able to autoload its classes, see %s and %s',
         '<em>config' . DIRECTORY_SEPARATOR . 'bootstrap.php</em>',
-        '<a href="https://book.cakephp.org/4/en/plugins.html#loading-a-plugin">Loading a plugin</a>',
-        '<a href="https://book.cakephp.org/4/en/plugins.html#autoloading-plugin-classes">Plugins - autoloading plugin classes</a>'
+        '<a href="https://book.cakephp.org/5/en/plugins.html#loading-a-plugin">Loading a plugin</a>',
+        '<a href="https://book.cakephp.org/5/en/plugins.html#autoloading-plugin-classes">Plugins - autoloading plugin classes</a>'
     );
 endif;