addResourceFileToGroup Is not being set for a target UUID that is different than the application native target

### Summary

I am trying to use `IOSConfig.XcodeUtils.addResourceFileToGroup` to add a font to my widget.
I expect the second checkbox to be selected after I run prebuild.

Code I am running:

```
console.log(`Target UUID: ${targetUuid}`)

for (const filePath of fontFiles) {
console.log(`Adding resource file ${filePath}`)
config.modResults = IOSConfig.XcodeUtils.addResourceFileToGroup({
filepath: path.join('Fonts', filePath),
groupName: 'Resources',
project,
isBuildFile: true,
verbose: true,
targetUuid, // I checked this UUID value and it is correct
});
}
console.log('Resource files copied successfully.')
```

output of prebuild
```
✔ Updated package.json and added index.js entry point for iOS and Android
› Installing using npm
> npm install
Updating Info.plist files
plistFilePath: /Users/johnottenlips/vestaboard/expo-native-fonts/example/ios/exponativefontsexampleWidgetExtension/Info.plist
Copying files
SourceDir: /Users/johnottenlips/vestaboard/expo-native-fonts/example/fonts
TargetDir: /Users/johnottenlips/vestaboard/expo-native-fonts/example/ios/Fonts
Font files copied to ios/Fonts
Adding fonts to target exponativefontsexampleWidgetExtension
Font files:
[
'Montserrat/Montserrat-Black.ttf',
'Montserrat/Montserrat-BlackItalic.ttf',
'Montserrat/Montserrat-Bold.ttf',
'Montserrat/Montserrat-BoldItalic.ttf'
]
Searching for target exponativefontsexampleWidgetExtension
Target UUID: E8F07E52AAB34508AF54FEE8 "exponativefontsexampleWidgetExtension"
Adding resource file Montserrat/Montserrat-Black.ttf
Adding resource file Montserrat/Montserrat-BlackItalic.ttf
Adding resource file Montserrat/Montserrat-Bold.ttf
Adding resource file Montserrat/Montserrat-BoldItalic.ttf
Resource files copied successfully.
```

The script looks like it runs fine, however, the target `exponativefontsexampleWidgetExtension` is not selected when I open the workspace.

Thanks! I'm happy to provide more details if needed!###

### Config Plugin

@config-plugins/apple-settings

### What platform(s) does this occur on?

iOS

### SDK Version

48, for this example, but I have also run into this on 50

### Reproducible demo

https://github.com/Vestaboard/expo-native-fonts/pull/1

```
"@expo/config-plugins": "~7.2.2",
// I also tried the latest 8.0.5
```
```
npm i
npm plugin:build
cd example
npm i
npm run prebuild
open ios/exponativefontsexample.xcworkspace
```

`exponativefontsexampleWidgetExtension` should be selected when I open the workspace.