marked rls as archived (#321)

Author: jarjk

index.html

@@ -3011,7 +3011,9 @@ <h4>Language servers</h4>
           <td></td>
         </tr>
         <tr>
-          <th>Rust</th>
+          <th>Rust
+            <span class="label label-warning">Archived</span>
+          </th>
           <td>
             <a href="https://github.com/nrc">Nick Cameron</a> and the Rust community
           </td>