Update flake.nix

flake.nix

@@ -16,7 +16,7 @@
         pkgs.buildGo123Module rec {
           name = "vpngate";
           src = ./.;
-          vendorHash = "sha256-CP2sFJdIde88WFJlAq29GlE7c1c0xJ6tHzrrasMzJo8=";
+          vendorHash = "sha256-CP2sFJdIde88WFJlAq29GlE7c1c0xJ6tHzrrasMzIo8=";
           nativeBuildInputs = pkgs.lib.optionals pkgs.stdenv.isLinux [ pkgs.makeWrapper ];
           env.CGO_ENABLED = 0;
           doCheck = false;
@@ -37,7 +37,7 @@
             packages = with pkgs; [
               gopls
               gotools
-              go_1_23
+              go_1_25
             ];
           };
         };