site: add multi-admin, 2FA, rate-limit rows to the landing comparison table

These shipped after the landing page was first built, so the table
was already behind. Kept every claim honest against the same source
(docs.rw) as before rather than just marking everything a win —
Remnawave's docs do claim some 2FA options (passkeys/OAuth), that's
noted rather than hidden; multi-admin and rate-limiting are genuine
differentiators (Remnawave has neither, Marzban's multi-admin is
still WIP per their own docs).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

landing/index.html

@@ -230,6 +230,9 @@
           <tr><td>Установка</td><td class="us">1 bash-команда</td><td>Docker Compose</td><td>bash-скрипт / Docker</td></tr>
           <tr><td>Backup & Restore в самой панели</td><td class="us yes">✓</td><td class="no">community tools</td><td class="no">community tools</td></tr>
           <tr><td>Xray config pre-flight проверка</td><td class="us yes">✓</td><td class="yes">full-featured</td><td class="no">только JSON-синтаксис</td></tr>
+          <tr><td>Мультиадминство (раздельные логины)</td><td class="us yes">✓</td><td class="no">—</td><td class="no">в разработке</td></tr>
+          <tr><td>2FA на вход в админку</td><td class="us yes">✓ TOTP</td><td>есть (passkeys/OAuth)</td><td class="no">—</td></tr>
+          <tr><td>Rate-limit на вход/2FA-код</td><td class="us yes">✓</td><td class="no">не документировано</td><td class="no">не документировано</td></tr>
           <tr><td>Лицензия</td><td class="us">MIT</td><td>AGPL-3.0</td><td>AGPL-3.0</td></tr>
         </tbody>
       </table>