docs(nixos): clarify guest option

configs/nixos/modules/guest.nix

@@ -3,7 +3,7 @@ let
   cfg = config.modules.guest; # NOLINT(let_order)
 in
 {
-  options.modules.guest.enable = lib.mkEnableOption "nested-guest base configuration";
+  options.modules.guest.enable = lib.mkEnableOption "nested guest configuration";
 
   config = lib.mkIf cfg.enable {
     modules.network.ssh.enable = lib.mkDefault false;