minor #13817 Update authorization.rst (atailouloute)

This PR was merged into the 5.0 branch.

Discussion
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Update authorization.rst

Starting from SF5.0 `getRoles()` is replaced by `getRoleNames()`

Commits
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4ab0b54 Update authorization.rst

Author: javiereguiluz

components/security/authorization.rst

@@ -123,7 +123,7 @@ RoleVoter
 The :class:`Symfony\\Component\\Security\\Core\\Authorization\\Voter\\RoleVoter`
 supports attributes starting with ``ROLE_`` and grants access to the user
 when at least one required ``ROLE_*`` attribute can be found in the array of
-roles returned by the token's :method:`Symfony\\Component\\Security\\Core\\Authentication\\Token\\TokenInterface::getRoles`
+roles returned by the token's :method:`Symfony\\Component\\Security\\Core\\Authentication\\Token\\TokenInterface::getRoleNames`
 method::
 
     use Symfony\Component\Security\Core\Authorization\Voter\RoleVoter;