[UPDATE] Edit the cdata_wrapping context option name following merged code

Author: AndoniLarz

components/serializer.rst

@@ -1206,7 +1206,7 @@ Option                          Description
 ``save_options``                XML saving `options with libxml`_                  ``0``
 ``remove_empty_tags``           If set to true, removes all empty tags in the      ``false``
                                 generated XML
-``enable_cdata_wrapping``       If set to false, will not wrap any value           ``true``
+``cdata_wrapping``              If set to false, will not wrap any value           ``true``
                                 containing one of the following characters (
                                 ``<``, ``>``, ``&``) in `a CDATA section`_ like
                                 following : ``<![CDATA[...]]>``