Bump coverlet.collector from 3.1.2 to 6.0.0

Bumps [coverlet.collector](https://github.com/coverlet-coverage/coverlet) from 3.1.2 to 6.0.0.
- [Release notes](https://github.com/coverlet-coverage/coverlet/releases)
- [Commits](https://github.com/coverlet-coverage/coverlet/commits/v6.0.0)

---
updated-dependencies:
- dependency-name: coverlet.collector
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

tests/UpcloudApiKubernetesOperator.Tests/UpcloudApiKubernetesOperator.Tests.csproj

@@ -15,7 +15,7 @@
     <PackageReference Include="NUnit" Version="3.13.3" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.3.0" />
     <PackageReference Include="NUnit.Analyzers" Version="3.5.0" />
-    <PackageReference Include="coverlet.collector" Version="3.1.2" />
+    <PackageReference Include="coverlet.collector" Version="6.0.0" />
     <PackageReference Include="KubeOps.Testing" Version="7.6.1" />
   </ItemGroup>