curl -X PUT https://api.rapidcall.ai/api/kb/folders/kb_folder_001 \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{ "name": "Updated FAQ" }'

{
  "folder": {
    "id": "kb_folder_001",
    "name": "Updated FAQ",
    "updatedAt": "2026-04-02T12:30:00Z"
  }
}