Update HTML files [skip action]

Author: github-actions[bot]

people.html

@@ -437,7 +437,7 @@ <h1 class="post-title">Lab Members</h1>
 <tbody>
 <tr>
   <td class="lab-member-cell" width="33%">
-    <!-- <img src="assets/images/angelina.png" style="max-width:100%;" alt="Angelina G&ouml;bel-Knapp" /> -->
+    <img src="assets/images/avatar.jpg" style="max-width:100%;" alt="Cora Leifheit" />
   </td>
   <td class="lab-member-cell" width="67%">
     <br />