flake.{nix,lock}: update Nix derivations

Author: rv-auditor

flake.lock

@@ -10,7 +10,7 @@
     flake-utils.follows = "k-framework/flake-utils";
     blockchain-k-plugin = {
       url =
-        "github:runtimeverification/blockchain-k-plugin/ff0cca91802d7957db5ea787db9be70db6a9075a";
+        "github:runtimeverification/blockchain-k-plugin/207ae5121e5178a09742ed746f2d15e34b1750cc";
       inputs.flake-utils.follows = "k-framework/flake-utils";
       inputs.nixpkgs.follows = "nixpkgs";
     };