update flake (#95)

Author: stehessel

flake.lock

@@ -19,7 +19,7 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
     nixpkgs-golang.url = "github:nixos/nixpkgs/nixpkgs-unstable";
-    nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-24.05";
+    nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-25.05";
     nixpkgs-terraform.url = "github:stackbuilders/nixpkgs-terraform";
     flake-parts.url = "github:hercules-ci/flake-parts";
   };