Add method parenthesis

Author: javiereguiluz

components/http_foundation.rst

@@ -381,7 +381,7 @@ Note you can create a
 :class:`Symfony\\Component\\HttpFoundation\\Cookie` object from a raw header value using :method:`Symfony\Component\HttpFoundation\Cookie::fromString`.
 
 .. versionadded:: 3.3
-    The ``Cookie::fromString`` method was introduced in Symfony 3.3.
+    The ``Cookie::fromString()`` method was introduced in Symfony 3.3.
 
 Managing the HTTP Cache
 ~~~~~~~~~~~~~~~~~~~~~~~