Update public/index.html

public/index.html

@@ -801,7 +801,7 @@
             <div class="col-4">
                <div class="team-member">
                 <div class="member-img">
-                  <img src="assets/img/team/avatar.png" class="img-fluid" alt="Prof. Dr. rer. nat. Michael Mommert">
+                  <img src="https://www.hft-stuttgart.de/fileadmin/Dateien/Profilbilder/_processed_/2/d/csm_michael_mommert_982fe198be.png" class="img-fluid" alt="Prof. Dr. rer. nat. Michael Mommert">
                 </div>
                 <div class="member-info">
                   <h4>