Update cheatsheets

tldr/ibmcloud-ks

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ibmcloud ks
+
+> Manage Kubernetes and OpenShift clusters in IBM Cloud.
+> More information: <https://cloud.ibm.com/docs/cli?topic=cli-kubernetes-service-cli>.
+
+- View the details of a cluster:
+
+`ibmcloud ks cluster get {{[-c|--cluster]}} {{cluster_id}}`
+
+- View the rotation status of Cluster Authority certificates for a cluster:
+
+`ibmcloud ks cluster ca status {{[-c|--cluster]}} {{cluster_id}}`
+
+- View worker pools of a cluster:
+
+`ibmcloud ks worker-pool ls {{[-c|--cluster]}} {{cluster_id}}`
+
+- Delete a worker node and replace it with a new one in the same worker pool:
+
+`ibmcloud ks worker replace {{[-c|--cluster]}} {{cluster_id}} {{[-w|--worker]}} {{worker_id}}`
+
+- List all actions available under this command:
+
+`ibmcloud ks help`