erp5_web: fix wrong XML structure for subsections in WebSite_viewSiteMapAsXML.

bt5/erp5_web/SkinTemplateItem/portal_skins/erp5_web_widget_library/WebSite_viewSiteMapAsXML.zpt

@@ -19,10 +19,10 @@
           <tal:block metal:define-macro="generateTree">
             <url tal:repeat="item menu_item/subsection">
               <loc tal:content="item/url" />
+            </url>
             <tal:recurse define="menu_item item" tal:condition="nocall:item/subsection">
               <metal:call use-macro="here/WebSite_viewSiteMapAsXML/macros/generateTree" />
             </tal:recurse>
-            </url>
           </tal:block>
         </tal:block>
       </tal:block>