nixos: Make services.resolved discoverable via "systemd-resolved" search

This query yielded no results on search.nixos.org.
I don't think I can make all options magically appear, but you can
the other options by reading the text.

Changed files
+3 -1
nixos
modules
system
+3 -1
nixos/modules/system/boot/resolved.nix
···
default = false;
type = types.bool;
description = lib.mdDoc ''
-
Whether to enable the systemd DNS resolver daemon.
'';
};
···
default = false;
type = types.bool;
description = lib.mdDoc ''
+
Whether to enable the systemd DNS resolver daemon, `systemd-resolved`.
+
+
Search for `services.resolved` to see all options.
'';
};