NW.js / MacOS - Fix release execution

`[ERROR] stderr: /bin/sh: ./01-empty-app.app/Contents/MacOS/01-empty-app: No such file or directory`

We need someone with a MacOS computer to run the build locally and fix this line:
https://github.com/Elanis/web-to-desktop-framework-comparison/blob/main/runner/config.js#L84