Fixed a minor syntax issue

Author: javiereguiluz

cookbook/bundles/best_practices.rst

@@ -346,8 +346,8 @@ The ``composer.json`` file should include at least the following metadata:
 * ``license``, ``MIT`` is the preferred license for Symfony bundles, but you
   can use any other value.
 * ``autoload``, this information is used by Symfony to load the classes of the
-bundle. The `PSR-4`_ autoload standard is recommended for modern bundles, but
-`PSR-0`_ standard is also supported.
+  bundle. The `PSR-4`_ autoload standard is recommended for modern bundles, but
+  `PSR-0`_ standard is also supported.
 
 In order to make it easier for developers to find your bundle, register it on
 `Packagist`_, the official repository for Composer packages.