Add at to the dependencies on Fedora (as in Deb)

fedora/jellyfin.spec

@@ -40,7 +40,7 @@ Jellyfin is a free software media system that puts you in control of managing an
 Summary:        The Free Software Media System Server backend
 Requires(pre):  shadow-utils
 Requires:       ffmpeg
-Requires:       libcurl, fontconfig, freetype, openssl, glibc libicu
+Requires:       libcurl, fontconfig, freetype, openssl, glibc, libicu, at
 
 %description server
 The Jellyfin media server backend.