Missing binaries for v0.40.0, v0.40.1

[v0.39.0](https://github.com/electron/fiddle/releases/tag/v0.39.0) is still marked as the [latest release](https://github.com/electron/fiddle/releases) on GitHub. The following tags [v0.40.0](https://github.com/electron/fiddle/releases/tag/v0.40.0) and [v0.40.1](https://github.com/electron/fiddle/releases/tag/v0.40.1) are not listed as releases and have no associated binaries.