Bump NunitXml.TestLogger from 5.0.0 to 6.0.0

Bumps [NunitXml.TestLogger](https://github.com/spekt/testlogger) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/spekt/testlogger/releases)
- [Changelog](https://github.com/spekt/testlogger/blob/master/CHANGELOG.md)
- [Commits](spekt/testlogger@v5.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: NunitXml.TestLogger
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Rdmp.Dicom.Tests/Rdmp.Dicom.Tests.csproj

@@ -50,7 +50,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
-    <PackageReference Include="NunitXml.TestLogger" Version="5.0.0" />
+    <PackageReference Include="NunitXml.TestLogger" Version="6.0.0" />
   </ItemGroup>
   <ItemGroup>
     <None Update="TestDatabases.txt">