add missing link

Co-Authored-By: Michael Hawker MSFT (XAML Llama) <michael.hawker@outlook.com>

Author: vgromfeld

docs/extensions/UIElementExtensions.md

@@ -45,11 +45,12 @@ The `ClipToBounds` property allows you to indicate whether to clip the content o
 | [Device family](http://go.microsoft.com/fwlink/p/?LinkID=526370) | Universal, 10.0.16299.0 or higher |
 | --- | --- |
 | Namespace | Microsoft.Toolkit.Uwp.UI.Extensions |
+| NuGet package | [Microsoft.Toolkit.Uwp.UI](https://www.nuget.org/packages/Microsoft.Toolkit.Uwp.UI/) |
 
 ## API
 
 - [UIElementExtensions source code](https://github.com/Microsoft/WindowsCommunityToolkit//blob/master/Microsoft.Toolkit.Uwp.UI/Extensions/UIElement)
 
 ## Related Topics
 
-- [UIElement.ClipToBounds Property (WPF)](https://docs.microsoft.com/en-us/dotnet/api/system.windows.uielement.cliptobounds?view=netframework-4.8)
+- [UIElement.ClipToBounds Property (WPF)](https://docs.microsoft.com/en-us/dotnet/api/system.windows.uielement.cliptobounds?view=netframework-4.8)