Change vat_number with vat_code as vat_number was removed

party.xml

@@ -11,7 +11,7 @@ this repository contains the full copyright notices and license terms. -->
                 <![CDATA[
                 <data>
                     <xpath
-                        expr="/tree/field[@name=&quot;vat_number&quot;]"
+                        expr="/tree/field[@name=&quot;vat_code&quot;]"
                         position="after">
                         <field name="receivable_today" select="2"/>
                         <field name="payable_today" select="2"/>