Update index.html

Add hint on where to click

public/index.html

@@ -452,7 +452,9 @@
 
                 <header class="section-header ">
                     <h2>City Demonstrator</h2>
-                    <p>Explore the City Demonstrator from HfT Stuttgart</p>
+                    <p>Explore our City Demonstrator</p>
+                    <p>Klick the Logo below!</p>
+
                 </header>
 
                 <div class="row ">