Update README.md

Author: andyzhangx

README.md

@@ -27,13 +27,11 @@ Please refer to `blob.csi.azure.com` [driver parameters](./docs/driver-parameter
 follow guide [here](./docs/install-driver-on-aks.md)
 
 ### Prerequisites
-#### Option#1: Provide cloud provider config with Azure cendentials
- - This option depends on [cloud provider config file](https://github.com/kubernetes/cloud-provider-azure/blob/master/docs/cloud-provider-config.md), usually it's `/etc/kubernetes/azure.json` on all Kubernetes agent nodes deployed by [AKS](https://docs.microsoft.com/en-us/azure/aks/) or [aks-engine](https://github.com/Azure/aks-engine), here is [azure.json example](./deploy/example/azure.json).
- > To specify a different cloud provider config file, create `azure-cred-file` configmap before driver installation, e.g. for OpenShift, it's `/etc/kubernetes/cloud.conf` (make sure config file path is in the `volumeMounts.mountPath`)
- > ```console
- > kubectl create configmap azure-cred-file --from-literal=path="/etc/kubernetes/cloud.conf" --from-literal=path-windows="C:\\k\\cloud.conf" -n kube-system
- > ```
- - This driver also supports [read cloud config from kuberenetes secret](./docs/read-from-secret.md).
+#### Option#1: Provide cloud provider config with Azure credentials
+ - This option depends on [cloud provider config file](https://github.com/kubernetes/cloud-provider-azure/blob/master/docs/cloud-provider-config.md), usually it's `/etc/kubernetes/azure.json` on agent nodes deployed by [AKS](https://docs.microsoft.com/en-us/azure/aks/) or [aks-engine](https://github.com/Azure/aks-engine), here is [azure.json example](./deploy/example/azure.json). <details> <summary>specify a different cloud provider config file</summary></br>create `azure-cred-file` configmap before driver installation, e.g. for OpenShift, it's `/etc/kubernetes/cloud.conf` (make sure config file path is in the `volumeMounts.mountPath`)
+</br><pre>```kubectl create configmap azure-cred-file --from-literal=path="/etc/kubernetes/cloud.conf" --from-literal=path-windows="C:\\k\\cloud.conf" -n kube-system```</pre></details>
+
+ - This driver also supports [read cloud config from kuberenetes secret](./docs/read-from-secret.md) as first priority
  - Make sure identity used by driver has `Contributor` role on node resource group
  - [How to set up CSI driver on Azure RedHat OpenShift(ARO)](https://github.com/ezYakaEagle442/aro-pub-storage/blob/master/setup-store-CSI-driver-azure-blob.md)