Update recipe_custom_action.rst

fixed xml closing bracket

Resources/doc/reference/recipe_custom_action.rst

@@ -53,7 +53,7 @@ Either by using XML:
 
             <argument />
             <argument>Acme\DemoBundle\Entity\Car</argument>
-            <argument>AcmeDemoBundle:CRUD</argument
+            <argument>AcmeDemoBundle:CRUD</argument>
 
             ...
 
@@ -211,4 +211,4 @@ The full example ``CarAdmin.php`` looks like this:
         {
             $collection->add('clone', $this->getRouterIdParameter().'/clone');
         }
-    }
+    }