Update zammad.json (#4682)

Author: tremor021

frontend/public/json/zammad.json

@@ -10,7 +10,7 @@
   "privileged": false,
   "interface_port": null,
   "documentation": "https://docs.zammad.org/en/latest/",
-  "website": "https://zammad.com/",
+  "website": "https://zammad.org/",
   "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons/webp/zammad.webp",
   "config_path": "/etc/nginx/sites-available/zammad.conf",
   "description": "Zammad is a web based open source helpdesk/customer support system with many features to manage customer communication via several channels like telephone, facebook, twitter, chat and emails. It is distributed under version 3 of the GNU AFFERO General Public License (GNU AGPLv3).",