update picture of alex

public/index.php

@@ -118,7 +118,7 @@ include "../templates/head.html"
                 </div>
 
                 <div class="col-6 col-sm-4 mb-4">
-                    <img class="img-fluid" src="images/alex.jpg" alt="alex">
+                    <img class="img-fluid" src="images/alex.png" alt="alex">
                     <p class="text-center">
                         <span class="ressort">Vice-President</span><br/>
                         Alexander Schoch