Bump Microsoft.NET.Test.Sdk from 17.3.2 to 17.6.0

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 17.3.2 to 17.6.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.3.2...v17.6.0)

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Tests.props

@@ -12,8 +12,8 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" Condition="'$(TargetFramework)' == 'netcoreapp2.1'" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" Condition="'$(TargetFramework)' != 'netcoreapp2.1'" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" Condition="'$(TargetFramework)' == 'netcoreapp2.1'" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" Condition="'$(TargetFramework)' != 'netcoreapp2.1'" />
     <PackageReference Include="Shouldly" Version="4.2.1" />
     <PackageReference Include="xunit" Version="2.4.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3" Condition="'$(TargetFramework)' == 'netcoreapp2.1'" />