flake.lock: bump

flake.nix: add ghostty
modules/home/programs/terminal/ghostty.nix: switch to ghostty flake

Signed-off-by: unexplrd <unexplrd@linerds.us>

modules/home/programs/terminal/ghostty.nix

@@ -1,6 +1,7 @@
 {
   config,
   lib,
+  perSystem,
   ...
 }:
 with lib; let
@@ -12,6 +13,7 @@ in {
   config = mkIf cfg.enable {
     programs.ghostty = {
       enable = true;
+      package = perSystem.ghostty.ghostty;
       settings = {
         gtk-single-instance = true;
         window-decoration = "client";