Update driver-parameters.md

Author: andyzhangx

docs/driver-parameters.md

@@ -76,6 +76,8 @@ mountPermissions | mounted folder permissions. The default is `0777`, if set as
 vnetResourceGroup | specify vnet resource group where virtual network is | existing resource group name | No | if empty, driver will use the `vnetResourceGroup` value in azure cloud config file
 vnetName | virtual network name | existing virtual network name | No | if empty, driver will use the `vnetName` value in azure cloud config file
 subnetName | subnet name | existing subnet name(s) of the agent node, if you want to update service endpoints on multiple subnets, separate them using a comma (`,`) | No | if empty, driver will update all the subnets under the cluster virtual network
+vnetLinkName | virtual network link name associated with private dns zone |  | No | if empty, driver will use the `vnetName + "-vnetlink"` by default
+publicNetworkAccess | `PublicNetworkAccess` property of created storage account by the driver | `Enabled`, `Disabled`, `SecuredByPerimeter` | No |
 
  - `fsGroup` securityContext setting