Add Great Lakes Software Symposium for general - #8571

// general

{
  "name": "Great Lakes Software Symposium",
  "url": "https://nofluffjuststuff.com/chicago",
  "startDate": "2026-10-22",
  "endDate": "2026-10-23",
  "city": "Chicago, IL",
  "country": "U.S.A.",
  "online": false,
  "locales": "EN",
  "cocUrl": "https://nofluffjuststuff.com/home/code_of_conduct"
}