8.2 release supports only Uno on .NET 9 while WinAppSDK is supported on .NET 8

### Describe the bug

These are targets for 8.2 release packages
**net8.0-windows10.0.19041**
[CommunityToolkit.WinUI.Extensions](https://www.nuget.org/packages/CommunityToolkit.WinUI.Extensions/) (>= 8.2.250402)
[Microsoft.WindowsAppSDK](https://www.nuget.org/packages/Microsoft.WindowsAppSDK/) (>= 1.6.250108002)
**net9.0**
[CommunityToolkit.WinUI.Extensions](https://www.nuget.org/packages/CommunityToolkit.WinUI.Extensions/) (>= 8.2.250402)
[Uno.Fonts.Fluent](https://www.nuget.org/packages/Uno.Fonts.Fluent/) (>= 2.4.5)
[Uno.WinUI](https://www.nuget.org/packages/Uno.WinUI/) (>= 5.5.87)
**net9.0-android35.0**
[CommunityToolkit.WinUI.Extensions](https://www.nuget.org/packages/CommunityToolkit.WinUI.Extensions/) (>= 8.2.250402)
[Uno.Fonts.Fluent](https://www.nuget.org/packages/Uno.Fonts.Fluent/) (>= 2.4.5)
[Uno.WinUI](https://www.nuget.org/packages/Uno.WinUI/) (>= 5.5.87)
**net9.0-ios18.0**
[CommunityToolkit.WinUI.Extensions](https://www.nuget.org/packages/CommunityToolkit.WinUI.Extensions/) (>= 8.2.250402)
[Uno.Fonts.Fluent](https://www.nuget.org/packages/Uno.Fonts.Fluent/) (>= 2.4.5)
[Uno.WinUI](https://www.nuget.org/packages/Uno.WinUI/) (>= 5.5.87)
**net9.0-maccatalyst18.0**
[CommunityToolkit.WinUI.Extensions](https://www.nuget.org/packages/CommunityToolkit.WinUI.Extensions/) (>= 8.2.250402)
[Uno.Fonts.Fluent](https://www.nuget.org/packages/Uno.Fonts.Fluent/) (>= 2.4.5)
[Uno.WinUI](https://www.nuget.org/packages/Uno.WinUI/) (>= 5.5.87)
**net9.0-windows10.0.19041**
[CommunityToolkit.WinUI.Extensions](https://www.nuget.org/packages/CommunityToolkit.WinUI.Extensions/) (>= 8.2.250402)
[Microsoft.WindowsAppSDK](https://www.nuget.org/packages/Microsoft.WindowsAppSDK/) (>= 1.6.250108002)

Are there any particular reasons .NET 8 is not supported?
I suppose it is just a mistake @michael-hawker

### Steps to reproduce

```text
Open https://www.nuget.org/packages/CommunityToolkit.WinUI.Controls.Primitives#dependencies-body-tab
```

### Expected behavior

All targets support both .NET 8 and .NET 9

### Screenshots

_No response_

### Code Platform

- [ ] UWP
- [ ] WinAppSDK / WinUI 3
- [x] Web Assembly (WASM)
- [x] Android
- [x] iOS
- [x] MacOS
- [x] Linux / GTK

### Windows Build Number

- [ ] Windows 10 1809 (Build 17763)
- [ ] Windows 10 1903 (Build 18362)
- [ ] Windows 10 1909 (Build 18363)
- [ ] Windows 10 2004 (Build 19041)
- [ ] Windows 10 20H2 (Build 19042)
- [ ] Windows 10 21H1 (Build 19043)
- [ ] Windows 10 21H2 (Build 19044)
- [ ] Windows 10 22H2 (Build 19045)
- [ ] Windows 11 21H2 (Build 22000)
- [ ] Other (specify)

### Other Windows Build number

_No response_

### App minimum and target SDK version

- [ ] Windows 10, version 1809 (Build 17763)
- [ ] Windows 10, version 1903 (Build 18362)
- [ ] Windows 10, version 1909 (Build 18363)
- [ ] Windows 10, version 2004 (Build 19041)
- [ ] Windows 10, version 2104 (Build 20348)
- [ ] Windows 11, version 22H2 (Build 22000)
- [ ] Other (specify)

### Other SDK version

_No response_

### Visual Studio Version

2022

### Visual Studio Build Number

_No response_

### Device form factor

_No response_

### Additional context

_No response_

### Help us help you

Yes, I'd like to be assigned to work on this item.

CommunityToolkit.WinUI.Controls.Primitives の依存関係ページから始め、公開されているターゲット フレームワークと、issue に記載されている 8.2 パッケージのターゲットを比較します。これらの依存関係を生成するリポジトリのパッケージまたはプロジェクト構成を確認します。関連するターゲットで .NET 8 と .NET 9 の両方が公開され、NuGet メタデータで変更が確認できれば完了です。

索引モデルが issue の本文から書いたものです。