[security] fixed wrong Twig function to check if user is granted to do an operation from a template

Author: hhamon

book/security/authorization.rst

@@ -153,17 +153,17 @@ syntax:
 
 .. configuration-block::
 
-    .. code-block:: php
+    .. code-block:: jinja
 
-        <?php if ($view['security']->isGranted('ROLE_ADMIN')): ?>
+        {% if is_granted("ROLE_ADMIN") %}
             <a href="...">Delete</a>
-        <?php endif ?>
+        {% endif %}
 
-    .. code-block:: jinja
+    .. code-block:: php
 
-        {% if has_role("ROLE_ADMIN") %}
+        <?php if ($view['security']->isGranted('ROLE_ADMIN')): ?>
             <a href="...">Delete</a>
-        {% endif %}
+        <?php endif ?>
 
 .. note::