Temporarily switch to a fork of iohk-nix with updated cardano-submit-api config

Author: Russoul

flake.lock

@@ -53,7 +53,7 @@
     incl.url = "github:divnix/incl";
 
     iohkNix = {
-      url = "github:input-output-hk/iohk-nix";
+      url = "github:russoul/iohk-nix/f9fe3eddaa4bc5fc92b5b928d2406a06f8530477";
       inputs.nixpkgs.follows = "nixpkgs";
     };