Fix invisible icons8

It was dued to icons8, the old icon was removed from their website.

projets/pro_static_site.php

@@ -170,7 +170,7 @@ include("../header.php");
     </p>
 
     <h3>
-        <img src="https://img.icons8.com/color/48/000000/icons8-logo.png" alt="V">
+        <img src="https://img.icons8.com/officel/48/000000/icons8-new-logo.png" alt="V">
         ICON8 : des icônes colorées
     </h3>
     <p>