bug #4707 [Cookbook] Fix XML example for RTE (dunglas)

This PR was merged into the 2.3 branch.

Discussion
----------

[Cookbook] Fix XML example for RTE

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all

Commits
-------

051b5ca [Cookbook] Fix XML example of RTE

Author: wouterj

cookbook/doctrine/resolve_target_entity.rst

@@ -132,7 +132,7 @@ about the replacement:
             <doctrine:config>
                 <doctrine:orm>
                     <!-- ... -->
-                    <doctrine:resolve-target-entity interface="Acme\InvoiceBundle\Model\InvoiceSubjectInterface">Acme\AppBundle\Entity\Customer</resolve-target-entity>
+                    <doctrine:resolve-target-entity interface="Acme\InvoiceBundle\Model\InvoiceSubjectInterface">Acme\AppBundle\Entity\Customer</doctrine:resolve-target-entity>
                 </doctrine:orm>
             </doctrine:config>
         </container>