Update date in json (#7649)

Co-authored-by: GitHub Actions <github-actions[bot]@users.noreply.github.com>

Author: community-scripts-pr-app[bot]

frontend/public/json/signoz.json

@@ -4,7 +4,7 @@
   "categories": [
     9
   ],
-  "date_created": "2025-09-12",
+  "date_created": "2025-09-15",
   "type": "ct",
   "updateable": true,
   "privileged": false,