docs(docs-infra): Add community russian translation

fixes angular#65720

Author: JeanMeche

adev/src/app/core/layout/footer/footer.component.html

@@ -107,6 +107,9 @@ <h2>Community translations</h2>
         <li>
           <a href="https://angular.kr/" title="한국어">한국어</a>
         </li>
+        <li>
+          <a href="https://angular-docs.ru/" title="Русский">Русский</a>
+        </li>
       </ul>
     </div>
   </div>