Add link to Copr builds

I know the badge is actually for the AUR build, but Repology doesn't support Copr for some reason, and Copr doesn't provide any fitting badge. They are likely to be updated basically at the same time anyway, so it's fine for now.

readme.md

@@ -48,6 +48,7 @@ free to, just please open an issue, or get in contact with me, so I can add it t
 | NixOS                | [![nixpkgs unstable](https://repology.org/badge/version-for-repo/nix_unstable/spotify-qt.svg?header=nixpkgs%20unstable)](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/audio/spotify-qt/default.nix)                                       | [karthikiyengar](https://github.com/karthikiyengar) |
 | openSUSE             | [![openSUSE Multimedia:Apps Tumbleweed package](https://repology.org/badge/version-for-repo/opensuse_multimedia_apps_tumbleweed/spotify-qt.svg?header=openSUSE)](https://software.opensuse.org//download.html?project=multimedia%3Aapps&package=spotify-qt) | [KaratekHD](https://github.com/KaratekHD)           |
 | Alpine Linux         | [![Alpine Linux Edge](https://repology.org/badge/version-for-repo/alpine_edge/spotify-qt.svg?header=Alpine%20Linux%20Edge)](https://pkgs.alpinelinux.org/packages?name=spotify-qt)                                                                          | [ptrcnull](https://github.com/ptrcnull)             |
+| Fedora               | [![Copr](https://repology.org/badge/version-for-repo/aur/spotify-qt.svg?header=Copr)](https://copr.fedorainfracloud.org/coprs/kraxarn/spotify-qt)                                                                                                           | [kraxarn](https://github.com/kraxarn)               |
 | Windows              | [![Scoop extras](https://repology.org/badge/version-for-repo/scoop/spotify-qt.svg?header=Scoop%20extras)](https://github.com/ScoopInstaller/Extras/blob/master/bucket/spotify-qt.json)                                                                      | [brian6932](https://github.com/brian6932)           |
 
 If you're running some other Linux distribution, macOS, or Windows, you can instead download portable binaries from the