docs: rename working trace page link

Author: Huaizz-shawen

index.html

@@ -86,7 +86,7 @@ <h2 class="subtitle publication-subtitle">An Embodied Task Agent Framework for<b
               <span class="icon"><i class="fas fa-robot"></i></span><span>Robot Stack</span>
             </a>
             <a class="button is-light is-rounded" href="static/examples/openeta-lite-example.html">
-              <span class="icon"><i class="fas fa-list-check"></i></span><span>openeta-lite-example</span>
+              <span class="icon"><i class="fas fa-route"></i></span><span>OpenETA working trace</span>
             </a>
           </div>
           <div class="hero-visual glass-card">