Bump KubernetesClient from 6.0.15 to 6.0.20 (#226)

Bumps [KubernetesClient](https://github.com/kubernetes-client/csharp) from 6.0.15 to 6.0.20.
- [Release notes](https://github.com/kubernetes-client/csharp/releases)
- [Commits](https://github.com/kubernetes-client/csharp/commits)

---
updated-dependencies:
- dependency-name: KubernetesClient
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

src/ES.Kubernetes.Reflector/ES.Kubernetes.Reflector.csproj

@@ -10,7 +10,7 @@
 
 	<ItemGroup>
 		<PackageReference Include="Autofac.Extensions.DependencyInjection" Version="7.1.0" />
-		<PackageReference Include="KubernetesClient" Version="6.0.15" />
+		<PackageReference Include="KubernetesClient" Version="6.0.20" />
 		<PackageReference Include="MediatR.Extensions.Microsoft.DependencyInjection" Version="9.0.0" />
 		<PackageReference Include="Microsoft.AspNetCore.JsonPatch" Version="5.0.11" />
 		<PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.14.0" />