update demos link again...

public/index.html

@@ -718,7 +718,7 @@
                             <a href="https://www.dreso.com " class=" align-items-center ">
                                 <img src="https://www.dreso.com/typo3conf/ext/dreso/Resources/Public/dreso-logo.svg " style="width: 120px;" alt=" "></a>
 
-                            <a href="http://icity.hft-stuttgart.de/demos.html " class="
+                            <a href="https://icity.hft-stuttgart.de/demos.html " class="
                              align-items-center ">
                                 <img src="assets/img/icityLogo.svg " style="width: 140px;  " alt=" "></a>
 
@@ -801,4 +801,4 @@
 
 </body>
 
-</html>
\ No newline at end of file
+</html>