Fix typos

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.6
| Fixed tickets |

Author: ifdattic

components/serializer.rst

@@ -331,7 +331,7 @@ having unique identifiers::
 
     $serializer = new Serializer(array($normalizer), array($encoder));
     echo $serializer->serialize($org, 'json');
-    // {"name":"Les-Tilleuls.coop","members":[{"name":"K\u00e9vin", organization: "Les-Tilleuls.coop"]}
+    // {"name":"Les-Tilleuls.coop","members":[{"name":"K\u00e9vin", organization: "Les-Tilleuls.coop"}]}
 
 JMSSerializer
 -------------