update

public/content/content.json

@@ -231,8 +231,7 @@
       "demo": "https://steinbeis-3dps.eu/3dps",
       "project": "https://www.ogc.org/standards/3dp",
       "repo": "https://transfer.hft-stuttgart.de/gitlab/ogc/node-3dps"
-    },
-    "refIndex": 5
+    }
   },
   {
     "item": {