Update docs to point to dotnet9 feed for daily builds

Author: vnbaaij

docs/using-latest-daily.md

@@ -14,15 +14,16 @@ If you just want the latest **released** version, the packages are on [NuGet.org
 
 The newest builds are pushed to a special feed, which you need to add in Visual Studio or through:
 ```sh
-dotnet nuget add source --name dotnet8 https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet8/nuget/v3/index.json
+dotnet nuget add source --name dotnet9 https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet9/nuget/v3/index.json
 ```
 
 This will add the feed to any existing NuGet.config in the current directory or above, or else
 in the global NuGet.config. See [configuring NuGet behavior](https://learn.microsoft.com/en-us/nuget/consume-packages/configuring-nuget-behavior) to read more about that.
 
 If you are using Visual Studio, you can [Install and manage packages in Visual Studio](https://learn.microsoft.com/nuget/consume-packages/install-use-packages-visual-studio#package-sources)
-and add the feed `https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet8/nuget/v3/index.json` there.
+and add the feed `https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet9/nuget/v3/index.json` there.
 
+**Although the feed name is dotnet9, the package still contains .NET 8 DLL and can be used in projects targeting that version.**
 ## Documentation
 
 Documentation and examples for this preliminary version are available at [https://preview.fluentui-blazor.net/](https://preview.fluentui-blazor.net/).