security.pam.usb: link to wiki on github.com

pamusb.org no longer serves the intended content.

Changed files
+1 -1
nixos
modules
security
+1 -1
nixos/modules/security/pam_usb.nix
···
description = ''
Enable USB login for all login systems that support it. For
more information, visit <link
-
xlink:href="http://pamusb.org/doc/quickstart#setting_up" />.
+
xlink:href="https://github.com/aluzzardi/pam_usb/wiki/Getting-Started#setting-up-devices-and-users" />.
'';
};