minor #13777 [Twig] Mention that passing an array of roles/attributes is deprecated (javiereguiluz)

This PR was merged into the 4.4 branch.

Discussion
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[Twig] Mention that passing an array of roles/attributes is deprecated

Fixes #13773.

Commits
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ac875c4 [Twig] Mention that passing an array of roles/attributes is deprecated

Author: javiereguiluz

reference/twig_reference.rst

@@ -154,6 +154,10 @@ Returns ``true`` if the current user has the given role. If several roles are
 passed in an array, ``true`` is returned if the user has at least one of
 them.
 
+.. deprecated:: 4.4
+
+    The feature to pass an array of roles to ``is_granted()`` was deprecated in Symfony 4.4.
+
 Optionally, an object can be passed to be used by the voter. More information
 can be found in :ref:`security-template`.