Bump Microsoft.NETCore.UniversalWindowsPlatform (#592)

Bumps [Microsoft.NETCore.UniversalWindowsPlatform](https://github.com/dotnet/core-setup) from 6.0.1 to 6.0.6.
- [Release notes](https://github.com/dotnet/core-setup/releases)
- [Commits](https://github.com/dotnet/core-setup/commits)

---
updated-dependencies:
- dependency-name: Microsoft.NETCore.UniversalWindowsPlatform
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

test-xamarin/WindowsUniversalTestApp16299/WindowsUniversalTestApp16299.csproj

@@ -132,7 +132,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform">
-      <Version>6.0.1</Version>
+      <Version>6.0.6</Version>
     </PackageReference>
   </ItemGroup>
   <ItemGroup>