fix crd code er

[tg123]

fix

Unhandled exception. k8s.Autorest.HttpOperationException: Operation returned an invalid status code 'NotFound', response body 404 page not found

   at k8s.Kubernetes.SendRequestRaw(String requestContent, HttpRequestMessage httpRequest, CancellationToken cancellationToken) in C:\workspace\k8scsharp\src\KubernetesClient\Kubernetes.cs:line 180
   at k8s.AbstractKubernetes.ICustomObjectsOperations_ListNamespacedCustomObjectWithHttpMessagesAsync[T](String group, String version, String namespaceParameter, String plural, Nullable`1 allowWatchBookmarks, String continueParameter, String fieldSelector, String labelSelector, Nullable`1 limit, String resourceVersion, String resourceVersionMatch, Nullable`1 timeoutSeconds, Nullable`1 watch, Nullable`1 pretty, IReadOnlyDictionary`2 customHeaders, CancellationToken cancellationToken) in C:\workspace\k8scsharp\src\KubernetesClient\LibKubernetesGenerator\LibKubernetesGenerator.KubernetesClientSourceGenerator\CustomObjectsOperations.g.cs:line 467
   at k8s.AbstractKubernetes.k8s.ICustomObjectsOperations.ListNamespacedCustomObjectWithHttpMessagesAsync[T](String group, String version, String namespaceParameter, String plural, Nullable`1 allowWatchBookmarks, String continueParameter, String fieldSelector, String labelSelector, Nullable`1 limit, String resourceVersion, String resourceVersionMatch, Nullable`1 timeoutSeconds, Nullable`1 watch, Nullable`1 pretty, IReadOnlyDictionary`2 customHeaders, CancellationToken cancellationToken) in C:\workspace\k8scsharp\src\KubernetesClient\LibKubernetesGenerator\LibKubernetesGenerator.KubernetesClientSourceGenerator\CustomObjectsOperations.g.cs:line 535
   at k8s.GenericClient.ListNamespacedAsync[T](String ns, CancellationToken cancel) in C:\workspace\k8scsharp\src\KubernetesClient\GenericClient.cs:line 55
   at customResource.Program.Main(String[] args) in C:\workspace\k8scsharp\examples\customResource\Program.cs:line 53
   at customResource.Program.<Main>(String[] args)

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[brendandburns]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: brendandburns, tg123

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