Temporarily switch to Navidrome unstable

packages/server/media/navidrome.nix

···
 {
   config,
   flakeLib,
+  pkgs-unstable,
   ...
 }:
 
···
 {
   services.navidrome = {
     enable = true;
+
+    # Unstable until #481611 is closed
+    package = pkgs-unstable.navidrome;
 
     settings = {
       Address = "unix:${socket}";