refactor: update documentation url

Author: mr150

index.html

@@ -25,7 +25,7 @@
             <a href="https://mlut.style/" class="Txd-n C-$accent800 C-$brand_h -Ts Fnw600"> Main</a>
           </li>
           <li class="M0">
-            <a href="https://mlutcss.github.io/mlut/" class="Txd-n C-$accent800 C-$brand_h -Ts Fnw600"> Docs</a>
+            <a href="https://docs.mlut.style/" class="Txd-n C-$accent800 C-$brand_h -Ts Fnw600"> Docs</a>
           </li>
         </ul>
       </nav>