Use nh in switch-remote target

Implemented in nix-community/nh#276

Author: stackptr

justfile

@@ -15,7 +15,7 @@ update:
   nix flake update --commit-lock-file
 
 switch-remote target-host build-host="localhost":
-  nixos-rebuild switch --flake .#{{target-host}} --target-host root@{{target-host}} --build-host {{build-host}}
+  nh os switch --flake .#{{target-host}} --target-host root@{{target-host}} --build-host {{build-host}}
 
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