Merge pull request #1331 from 1ed/patch-2

[DOCS] Fixed class name in aggregate fields example

docs/en/cookbook/aggregate-fields.rst

@@ -332,7 +332,7 @@ Optimistic locking is as easy as adding a version column:
 .. code-block:: php
 
     <?php
-    class Amount
+    class Account
     {
         /** @Column(type="integer") @Version */
         private $version;