promptfoo: fix build with nodejs_24

pkgs/by-name/pr/promptfoo/package.nix

@@ -1,5 +1,6 @@
 {
   buildNpmPackage,
+  nodejs_22,
   fetchFromGitHub,
   lib,
 }:
@@ -17,6 +18,9 @@ buildNpmPackage (finalAttrs: {
 
   npmDepsHash = "sha256-mpe00J5iRwaH7hJIDP3fDuJSUOKk01COpOOvF1YJMyg=";
 
+  # https://github.com/NixOS/nixpkgs/issues/474535
+  nodejs = nodejs_22;
+
   # don't fetch playwright binary
   env.PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD = "1";