bug #4075 Fixed typo in the yml validation (timothymctim)

This PR was merged into the 2.3 branch.

Discussion
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Fixed typo in the yml validation

The `Valid` property should be added to `Acme\HelloBundle\Entity\Author` instead of `Acme\HelloBundle\Author`.

Commits
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03990ae Fixed typo in the yml validation

Author: weaverryan

reference/constraints/Valid.rst

@@ -194,7 +194,7 @@ property.
     .. code-block:: yaml
 
         # src/Acme/HelloBundle/Resources/config/validation.yml
-        Acme\HelloBundle\Author:
+        Acme\HelloBundle\Entity\Author:
             properties:
                 address:
                     - Valid: ~