Update public/index.html

public/index.html

@@ -382,7 +382,7 @@
          <!-- Insert Detlef's details here -->
           <div class="col-lg-3 col-md-6 mb-lg-0 mb-5">
              <div class="avatar mx-auto">
-              <img src="https://www.hft-stuttgart.de/fileadmin/Dateien/Profilbilder/_processed_/2/6/csm_webseite_64f11b123d.jpg" class="rounded-circle z-depth-1" width="150px">
+              <img src="https://www.hft-stuttgart.de/fileadmin/Dateien/Profilbilder/_processed_/2/6/csm_webseite_bec17697cf.webp" class="rounded-circle z-depth-1" width="150px">
             </div>
             <h5 class="font-weight-bold mt-4 mb-3">Prof. Dr.-Ing. Detlef Pape</h5>
             <p class="text-uppercase blue-text"><strong>Research Group Leader</strong></p>