Merge pull request #295547 from Janik-Haag/unbound

nixos/unbound: drop networkmanager since it doesn't support unbound anymore

nixos/modules/services/networking/unbound.nix

···
       resolvconf = {
         useLocalResolver = mkDefault true;
       };
-
-      networkmanager.dns = "unbound";
     };
 
     environment.etc."unbound/unbound.conf".source = confFile;