Update CommunityToolkit.Maui.Markup.UnitTests.csproj

Author: TheCodeTraveler

src/CommunityToolkit.Maui.Markup.UnitTests/CommunityToolkit.Maui.Markup.UnitTests.csproj

@@ -15,6 +15,7 @@
     <PackageReference Include="Microsoft.Testing.Extensions.CodeCoverage" Version="17.14.2" />
     <PackageReference Include="CommunityToolkit.Maui" Version="$(MauiCommunityToolkitPackageVersion)" />
     <PackageReference Include="Microsoft.Maui.Controls" Version="$(MauiPackageVersion)"/>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
   </ItemGroup>
 
   <ItemGroup>