BASE_PATH in documentation may be inaccurate

[Deepak-Vohra]

The BASE_PATH in Phalcon tutorial https://docs.phalconphp.com/en/3.4/tutorial-base is inaccurate.

define('BASE_PATH', dirname(__DIR__));

Based on directory structure used with index.php in public dir BASE_PATH should be define('BASE_PATH', dirname(__DIR__ . '/..'));

[niden]

cc @emiliodeg Can you please have a look ?