Minor rewording for the security:checker article

Author: javiereguiluz

security/security_checker.rst

@@ -27,11 +27,7 @@ FriendsOfPHP organization.
 .. note::
 
     To enable the ``security:check`` command, make sure the
-    `SensioDistributionBundle`_ is installed.
-
-    .. code-block:: terminal
-
-        $ composer require 'sensio/distribution-bundle'
+    `SensioDistributionBundle`_ is enabled in your application.
 
 .. _`security advisories database`: https://github.com/FriendsOfPHP/security-advisories
 .. _`SensioDistributionBundle`: https://packagist.org/packages/sensio/distribution-bundle