rdedup: fix broken build

In the Rust platform builder, the attribute `cargoPatches` must be used if we
want to consistently apply a patch to the `Cargo.lock` in the vendored
`cargoDeps` and to the `Cargo.lock` in the `src` attribute.

This fixes the build by applying that patch consistently, so the coherency
checker in the newer Rust cargo builder passes.

pkgs/tools/backup/rdedup/default.nix

@@ -13,9 +13,9 @@ rustPlatform.buildRustPackage rec {
     sha256 = "0y34a3mpghdmcb2rx4z62q0s351bfmy1287d75mm07ryfgglgsd7";
   };
 
-  cargoSha256 = "1zvg68ilgpnd95b36jvna9h1jr5d72x1a0g6flw2x6sd0msc0mdw";
+  cargoSha256 = "0akwb7ak4h1i1zk4wcn27zyqjz6mrchs47014xbzw22rj8h8dx92";
 
-  patches = [
+  cargoPatches = [
     ./v3.1.1-fix-Cargo.lock.patch
   ];