Hey, I think you need to download the most recent file from here (in your case .rpm file), and then...
* go to the directory where the file is downloaded
* right click in the space, and select 'Open in Terminal'
* run this command: sudo dnf install <downloaded file name>.rpm
No need to uninstall previous Cider version, this command will take care of it.
After it completes, now open Cider and 'check for updates'... it should work