Update install_cluster-milvusoperator.md

site/en/getstarted/run-milvus-k8s/install_cluster-milvusoperator.md

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 - Before installing Milvus, it is recommended to use the [Milvus Sizing Tool](https://milvus.io/tools/sizing) to estimate the hardware requirements based on your data size. This helps ensure optimal performance and resource allocation for your Milvus installation.
 
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+If you encounter any issues pulling the image, contact us at <a href="mailto:community@zilliz.com">community@zilliz.com</a> with details about the problem, and we'll provide you with the necessary support.
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 ## Install Milvus Operator
 
 Milvus Operator defines a Milvus cluster custom resources on top of [Kubernetes Custom Resources](https://kubernetes.io/docs/concepts/extend-kubernetes/api-extension/custom-resources/). When custom resources are defined, you can use K8s APIs in a declarative way and manage the Milvus deployment stack to ensure its scalability and high availability.