erp5_web_renderjs_ui: Use the expected context

bt5/erp5_web_renderjs_ui/SkinTemplateItem/portal_skins/erp5_web_renderjs_ui/WebSite_viewResetPassword.zpt

@@ -33,7 +33,7 @@
             <tal:block tal:define="preference_tool python: portal.portal_preferences"
                        tal:condition="python: preference_tool.isAuthenticationPolicyEnabled() and preference_tool.getPreferredPasswordPolicyReference()">
               <label i18n:domain="ui" i18n:translate="">Password Policy</label>
-              <tal:block tal:replace="structure python: context.Preference_getPasswordPolicy()"></tal:block>
+              <tal:block tal:replace="structure python: preference_tool.Preference_getPasswordPolicy()"></tal:block>
             </tal:block>
             <form method="post" tal:attributes="action python: context.absolute_url()" class="field_container">
               <section class="ui-content-header-plain">