Fix the whitelist mode display not being enabled in the admin dashboard (mastodon#11634)

Author: mayaeh

app/views/admin/dashboard/index.html.haml

@@ -103,7 +103,7 @@
         %li
           = feature_hint(t('admin.dashboard.authorized_fetch_mode'), @authorized_fetch)
         %li
-          = feature_hint(t('admin.dashboard.whitelist_mode'), @whitelist_mode)
+          = feature_hint(t('admin.dashboard.whitelist_mode'), @whitelist_enabled)
         %li
           = feature_hint('LDAP', @ldap_enabled)
         %li