Moved the note before the label

Author: javiereguiluz

components/serializer.rst

@@ -312,10 +312,10 @@ You are now able to serialize only attributes in the groups you want::
     );
     // $obj2 = MyObj(foo: 'foo', bar: 'bar')
 
-.. _ignoring-attributes-when-serializing:
-
 .. include:: /_includes/_rewrite_rule_tip.rst.inc
 
+.. _ignoring-attributes-when-serializing:
+
 Ignoring Attributes
 -------------------