Improve the Helm charts docs

fix typo

helm-chart/kubray-operator/README.md

@@ -18,23 +18,23 @@ version.BuildInfo{Version:"v3.6.2", GitCommit:"ee407bdf364942bcb8e8c665f82e15aa2
 
 Please use command below:
 ```console
-$ helm install  kubray-operator . --values values.yaml --namespace default --create-namespace
+$ helm install kuberay-operator . --values values.yaml --namespace kuberay-operator --create-namespace
 ```
 ## List the Chart
 
 To list the `my-release` deployment:
 
 ```console
-$ helm list -n default
+$ helm list -n kuberay-operator
 ```
 
 ## Uninstalling the Chart
 
 To uninstall/delete the `my-release` deployment:
 
 ```console
-$ helm delete kubray-operator
+$ helm delete kuberay-operator -n kuberay-operator
 ```
 
 The command removes nearly all the Kubernetes components associated with the
-chart and deletes the release.
+chart and deletes the release.

helm-chart/ray-cluster/README.md

@@ -14,7 +14,7 @@ version.BuildInfo{Version:"v3.6.2", GitCommit:"ee407bdf364942bcb8e8c665f82e15aa2
 ## TL;DR;
 
 ```console
-helm install --name ray-cluster . --values values.yaml --namespace default
+helm install ray-cluster . --values values.yaml --namespace ray-system --create-namespace
 ```
 
 ## Installing the Chart
@@ -23,26 +23,26 @@ To install the chart with the release name `my-release`:
 
 
 ```console
-helm install --name sample ray-cluster --values ray-cluster/values.yaml --namespace default
+helm install my-release . --values values.yaml --namespace ray-system --create-namespace
 ```
 
-> note: The chart will submit a RayCluster. 
+> note: The chart will submit a RayCluster.
 
 
 ## Uninstalling the Chart
 
 To uninstall/delete the `my-release` deployment:
 
 ```console
-helm delete ray-cluster
+helm delete my-release -n ray-system
 ```
 
 The command removes nearly all the Kubernetes components associated with the
 chart and deletes the release.
 
 ## Check Cluster status
 
-### Get Service 
+### Get Service
 
 ```console
 $ kubectl get svc -l ray.io/cluster=ray-cluster