Update content.json

public/content/content.json

@@ -649,7 +649,7 @@
     },
     "links": {
       "youtube": "https://www.youtube.com/watch?v=PY904hd2hMI&ab_channel=CIVTutorials",
-      "demo": "https://gitlab.com/volkercoors/CiD4Sim/-/wikis/usefulTools/FME-Workbenches",
+      "demo": "https://gitlab.com/volkercoors/CiD4Sim/-/wikis/usefulTools/FME-Workbenches-(EN)",
       "project": "https://projekt.beuth-hochschule.de/citydoctor2/"
     },
     "refIndex": 8