Minor tweak

Author: javiereguiluz

security/csrf.rst

@@ -151,7 +151,7 @@ generate a CSRF token in the template and store it as a hidden form field:
 
 Then, get the value of the CSRF token in the controller action and use the
 :method:`Symfony\\Bundle\\FrameworkBundle\\Controller\\ControllerTrait::isCsrfTokenValid`
-to check its validity::
+method to check its validity::
 
     use Symfony\Component\HttpFoundation\Request;
     use Symfony\Component\HttpFoundation\Response;