Update wcp install doc (#602)

Signed-off-by: Xing Yang <[email protected]>

Author: xing-yang

docs/how-to-enable-supervisor-service.png

@@ -3,14 +3,13 @@
 Users here are expected to be vSphere users with access to:
 
 * vSphere UI
-* [Kubectl vSphere plugin](https://docs.vmware.com/en/VMware-vSphere/7.0/vmware-vsphere-with-tanzu/GUID-0F6E45C4-3CB1-4562-9370-686668519FCA.html)
+* [Kubectl vSphere plugin](https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-with-tanzu-tkg/GUID-8699B9DE-01D9-4B2A-BBFB-EB1D81878587.html)
 
 ## Installing Velero on Supervisor cluster
 
-1. Enable `Velero vSphere Operator` Supervisor Service via vSphere UI. If you do not see any of the Supervisor Services as shown below, please double check the [compatibility](supervisor.md#compatibility) matrix.
-    ![How to enable `Velero vSphere Operator` supervisor service](how-to-enable-supervisor-service.png)
+Note: `Velero vSphere Operator` Supervisor Service is enabled by default on vSphere 80u3 and later.
 
-2. Create a supervisor namespace for Velero instance via vSphere UI.
+1. Create a supervisor namespace for Velero instance via vSphere UI.
     ![How to create a supervisor namespace](how-to-create-supervisor-namespace.png)
 
     And for user doesn't have VI Admin role, please add **EDIT** permission to the Supervisor namespace.
@@ -19,7 +18,7 @@ Users here are expected to be vSphere users with access to:
     Below is an example.
     ![What to do when adding edit permission](grant-edit-permission.png)
 
-3. Create Velero vSphere Plugin Config
+2. Create Velero vSphere Plugin Config
 
     The config map is used to specify that the plugin is being installed on `SUPERVISOR` cluster.
 
@@ -33,9 +32,8 @@ data:
   cluster_flavor: SUPERVISOR
 EOF
 ```
-     
 
-4. Run [Velero vSphere Operator CLI](velero-vsphere-operator-cli.md), **velero-vsphere**, to install Velero into the same namespace created in step 2 above.
+3. Run [Velero vSphere Operator CLI](velero-vsphere-operator-cli.md), **velero-vsphere**, to install Velero into the same namespace created in the previous step.
 Assume users have logged in `kubectl vSphere plugin` as vSphere users.
 Below are some examples about `velero-vsphere install` for different object stores as backup storage locations of Velero.