added citydemonstrator to content.json

public/content/content.json

@@ -18,8 +18,8 @@
     },
     "refIndex": 5,
     "links": {
-      "demo": "https://urbanvis.hft-stuttgart.de/Testgebiete.html",      
-      "project":"https://www.hft-stuttgart.de/forschung/projekte/aktuell/inspirer"
+      "demo": "https://citydemonstrator.hft-stuttgart.de/",      
+      "project":"http://icity.hft-stuttgart.de/#/"
     }
   }, 
   {