[Reference] Fix order of config blocks

Author: xelaris

reference/constraints/Image.rst

@@ -159,17 +159,6 @@ following code:
 
 .. configuration-block::
 
-    .. code-block:: yaml
-
-        # src/Acme/BlogBundle/Resources/config/validation.yml
-        Acme\BlogBundle\Entity\Author
-            properties:
-                headshot:
-                    - Image:
-                        allowLandscape: false
-                        allowPortrait: false
-
-
     .. code-block:: php-annotations
 
         // src/Acme/BlogBundle/Entity/Author.php
@@ -188,6 +177,16 @@ following code:
             protected $headshot;
         }
 
+    .. code-block:: yaml
+
+        # src/Acme/BlogBundle/Resources/config/validation.yml
+        Acme\BlogBundle\Entity\Author
+            properties:
+                headshot:
+                    - Image:
+                        allowLandscape: false
+                        allowPortrait: false
+
     .. code-block:: xml
 
         <!-- src/Acme/BlogBundle/Resources/config/validation.xml -->