I think you can update it in the zap.stream UI. Although I don't know where the option is. nostr:npub1v0lxxxxutpvrelsksy8cdhgfux9l6a42hsj2qzquu2zk7vc9qnkszrqj49

Go to zapstream, click stream on the top right. on the window that opens click on manual. Under "status" you'll see live, planned, ended. click on ended, save. done.