fix: add missing link to sysarmy mexico

Author: Nachichuri

en/chapters/index.html

@@ -329,6 +329,9 @@ <h3>Sysarmy México</h3>
                             title="Meetup">
                             <i class="fab fa-meetup"></i>
                         </a>
+                        <a href="https://t.me/sysarmymx" class="social-link" target="_blank" title="Telegram">
+                            <i class="fa-brands fa-telegram"></i>
+                        </a>
                     </div>
                 </div>