fix: hide help button in unauthenticated studio header (#34249)

Co-authored-by: Zia Fazal <zia.fazal@arbisoft.com>

cms/templates/widgets/header.html

@@ -360,9 +360,11 @@
       <nav class="nav-not-signedin nav-pitch" aria-label="${_('Account')}">
         <h2 class="sr-only">${_("Account Navigation")}</h2>
         <ol>
+          % if settings.FEATURES.get('ENABLE_HELP_LINK'):
           <li class="nav-item nav-not-signedin-help">
             <a href="${get_online_help_info(online_help_token)['doc_url']}" title="${_('Contextual Online Help')}" rel="noopener" target="_blank">${_("Help")}</a>
           </li>
+          % endif
           % if static.get_value('ALLOW_PUBLIC_ACCOUNT_CREATION', settings.FEATURES.get('ALLOW_PUBLIC_ACCOUNT_CREATION')) and settings.FEATURES.get('SHOW_REGISTRATION_LINKS', True):
               <li class="nav-item nav-not-signedin-signup">
                 <a class="action action-signup" href="${settings.FRONTEND_REGISTER_URL}?next=${quote_plus(request.build_absolute_uri(settings.LOGIN_URL))}">${_("Sign Up")}</a>