add flathub into setup script

bin/kinoite-setup.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
 
+flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrep
 rpm-ostree override remove firefox firefox-langpacks
 rpm-ostree install distrobox