Update public/index.html

public/index.html

@@ -338,7 +338,7 @@
                     </div>
                     <h5 class="font-weight-bold mt-4 mb-3">Niko Jochim</h5>
                     <p class="text-uppercase blue-text"><strong>Academic staff member</strong></p>
-                    <a href="https://www.hft-stuttgart.de/p/niko-jochim" target="_blank">
+                    <a href="imgs/grey_dot.png" target="_blank">
                     <button class="btn btn-primary btn-sm profile">See full profile</button>
                   </a>