nixos/ddclient: fix documentation link formatting

Changed files
+1 -1
nixos
modules
services
networking
+1 -1
nixos/modules/services/networking/ddclient.nix
···
default = "dyndns2";
type = str;
description = ''
-
Protocol to use with dynamic DNS provider (see https://ddclient.net/protocols.html ).
'';
};
···
default = "dyndns2";
type = str;
description = ''
+
Protocol to use with dynamic DNS provider (see <https://ddclient.net/protocols.html> ).
'';
};