Bump the testing group across 1 directory with 3 updates

Bumps the testing group with 3 updates in the / directory: [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest), [Shouldly](https://github.com/shouldly/shouldly) and [Verify.Xunit](https://github.com/VerifyTests/Verify).


Updates `Microsoft.NET.Test.Sdk` from 17.12.0 to 17.13.0
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.12.0...v17.13.0)

Updates `Shouldly` from 4.2.1 to 4.3.0
- [Release notes](https://github.com/shouldly/shouldly/releases)
- [Changelog](https://github.com/shouldly/shouldly/blob/master/BREAKING%20CHANGES.txt)
- [Commits](shouldly/shouldly@4.2.1...4.3.0)

Updates `Verify.Xunit` from 28.5.0 to 28.11.0
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](VerifyTests/Verify@28.5.0...28.11.0)

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: testing
- dependency-name: Shouldly
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: testing
- dependency-name: Verify.Xunit
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: testing
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

test/Tests.csproj

@@ -20,9 +20,9 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-    <PackageReference Include="Shouldly" Version="4.2.1" />
-    <PackageReference Include="Verify.Xunit" Version="28.5.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
+    <PackageReference Include="Shouldly" Version="4.3.0" />
+    <PackageReference Include="Verify.Xunit" Version="28.11.0" />
     <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>