landing: use egoSample montage cover

index.html

@@ -23,7 +23,7 @@ header{padding:26px 28px 6px}h1{margin:0 0 5px;font-size:23px}.sub{color:#9aa1ad
       <span class="tag">LeRobot · a2 · 6 episodes</span></div>
   </a>
   <a class="card" href="egoSample/index.html">
-    <img src="egoSample/demo02/thumb.jpg" alt="Ego Sample">
+    <img src="egoSample/cover.jpg" alt="Ego Sample">
     <div class="m"><div class="t">Ego Sample</div>
       <div class="r">PICO head-mounted first-person capture · 6 episodes.<br>Stereo fisheye + depth, 3D hand-pose &amp; 3D head-pose (orbit), head velocity / rotation, temporal spans.</div>
       <span class="tag">ego-rgb · 6 episodes · hand+head 3D</span></div>