offloading: Fix network.nix import

modules/offloading/offload.nix

@@ -1,7 +1,7 @@
 { config, lib, pkgs, ... }:
 
 let
-  network = import ../../network.nix;
+  network = import ../../lib/network.nix;
   cfg = config.ptw.system.offloading.offload;
 in {
   options.ptw.system.offloading.offload = {