bumped nixpkgs

[eyJhb]

Commit https://github.com/NixOS/nixpkgs/commit/df590070b007b2cd2f64647b2780c903506aa21f adds an additional type, and without this nixus breaks with the change.

installing
error: attribute 'singleLineStr' missing
       at /nix/store/g4pv0kxp4rf7sqd4jm3g1hc03blfvj5s-pkgs-unstable-patched/nixos/modules/services/networking/ssh/sshd.nix:33:29:
           32|       keys = mkOption {
           33|         type = types.listOf types.singleLineStr;
             |                             ^
           34|         default = [];
(use '--show-trace' to show detailed location information)

[infinisil]

Nice thanks!