OCPBUGS-9210: Updated folder parameter info in vSphere UPI docs

Author: dfitzmau

modules/installation-vsphere-config-yaml.adoc

@@ -154,7 +154,7 @@ value must match the number of control plane machines that you deploy.
 <7> Establishes the relationships between a region and zone. You define a failure domain by using vCenter objects, such as a `datastore` object. A failure domain defines the vCenter location for {product-title} cluster nodes.
 <8> The vSphere datacenter.
 <9> Optional parameter. For installer-provisioned infrastructure, the absolute path of an existing resource pool where the installation program creates the virtual machines, for example, `/<datacenter_name>/host/<cluster_name>/Resources/<resource_pool_name>/<optional_nested_resource_pool_name>`. If you do not specify a value, resources are installed in the root of the cluster `/example_datacenter/host/example_cluster/Resources`.
-<10> Optional parameter For installer-provisioned infrastructure, the absolute path of an existing folder where the installation program creates the virtual machines, for example, `/<datacenter_name>/vm/<folder_name>/<subfolder_name>`. If you do not provide this value, the installation program creates a top-level folder in the datacenter virtual machine folder that is named with the infrastructure ID. If you are providing the infrastructure for the cluster, omit this parameter.
+<10> Optional parameter For installer-provisioned infrastructure, the absolute path of an existing folder where the installation program creates the virtual machines, for example, `/<datacenter_name>/vm/<folder_name>/<subfolder_name>`. If you do not provide this value, the installation program creates a top-level folder in the datacenter virtual machine folder that is named with the infrastructure ID. If you are providing the infrastructure for the cluster and you do not want to use the default `StorageClass` object, named `thin`, you can omit the `folder` parameter from the `install-config.yaml` file.
 <11> The fully-qualified hostname or IP address of the vCenter server.
 <12> The password associated with the vSphere user.
 <13> The vSphere disk provisioning method.