Update python & java readmes for ContainerService/aks 2023-09-02-preview#26126

FumingZhang merged 1 commit intoAzure:FumingZhang-containerservice-Microsoft.ContainerService-2023-09-02-previewAzure/azure-rest-api-specs:FumingZhang-containerservice-Microsoft.ContainerService-2023-09-02-previewfrom

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