[BUG] MacOS logo does not change

### :information_source: Info
Version: v0.13.1
OS: MacOS Ventura 13.6 (22G120)
Model: MacBook Air M1 2020

### :speech_balloon: Description
The icons produced are correct as far as I am aware and you can see them in each folder, but when I run it on MacOS it just shows the default icon. I tested it on Chrome (web) and it show the logo I set as expected.

### :scroll: Pubspec.yaml
```
flutter_launcher_icons:
image_path: "assets/images/logo.png"
ios: true
remove_alpha_ios: true
android: true
web:
generate: true
windows:
generate: true
macos:
generate: true
```

### :desktop_computer: Output
```
Building package executable... (1.4s)
Built flutter_launcher_icons:flutter_launcher_icons.
════════════════════════════════════════════
FLUTTER LAUNCHER ICONS (v0.13.1)
════════════════════════════════════════════

• Creating default icons Android
• Overwriting the default Android launcher icon with a new icon
• Overwriting default iOS launcher icon with new icon
Creating Icons for Web... done
Creating Icons for Windows... done
Creating Icons for MacOS... done

✓ Successfully generated launcher icons

```

Start with the macos section of the pubspec.yaml configuration and reproduce the reported behavior on macOS Ventura using the supplied logo. Trace the macOS icon-generation entry point, then verify that the generated icon is used by the built application rather than only appearing in the project folders; done means the custom icon replaces the default on macOS.

Written by the indexing model from the issue text.