Mixed up files when using multiple makers: Squirrel files end up in the zip

### Pre-flight checklist

- [x] I have read the [contribution documentation](https://github.com/electron/forge/blob/main/CONTRIBUTING.md) for this project.
- [x] I agree to follow the [code of conduct](https://github.com/electron/electron/blob/main/CODE_OF_CONDUCT.md) that this project uses.
- [x] I have searched the issue tracker for a bug that matches the one I want to file, without success.

### Forge version

7.7.0

### Electron version

35.0.0

### Operating system

Windows

### Last known working Forge version

_No response_

### Expected behavior

When using multiple makers, each installer should go in its own output directory.

### Actual behavior

Output files get mixed up.

### Steps to reproduce

Start from a template:

`npx create-electron-app@latest my-app --template=webpack-typescript`

Modify forge.config.ts to have two makers (by default, there's a single one on Windows):

```
// ...
makers: [new MakerSquirrel({}), new MakerZIP({})],
// ...
```

Generate distributables:

`electron-forge make`

In the zip archive, there's a Squirel.exe binary.


### Additional information

_No response_