fix(ci): patchShebangs for the Node CLI in test-js

The Garnix linux sandbox has no /usr/bin/env, so invoking
./bin/printable-binary-node.js via its '#!/usr/bin/env node' shebang failed
(exit 126). patchShebangs rewrites it to the nix node before running test/test.
(Passed locally on darwin only because macOS has /usr/bin/env.)

Author: pmarreck

flake.nix

@@ -303,6 +303,7 @@
             nativeBuildInputs = with pkgs; [ nodejs_24 python3 xxd hexdump ];
             buildPhase = ''
               export HOME=$TMPDIR
+              patchShebangs bin/printable-binary-node.js
               IMPLEMENTATION_TO_TEST=./bin/printable-binary-node.js bash ./test/test
             '';
             installPhase = "mkdir -p $out && touch $out/passed";