Update admin recommended folder data source docs (#320)

Author: emichaeli

website/docs/d/admin_recommended_folder.html.markdown

@@ -8,10 +8,28 @@ description: |-
 # sumologic_admin_recommended_folder
 Provides an easy way to retrieve the Admin Recommended Folder.
 
+In order to use the Admin Recommended Folder, you should configure the provider to run in admin mode.
+Please refer to the [Example Usage](#example-usage) section below for more details. 
 
 ## Example Usage
 ```hcl
+# Configure the Sumo Logic Provider in Admin Mode
+provider "sumologic" {
+  ...
+  admin_mode  = true
+  alias       = "admin"
+}
+
+# Look up the Admin Recommended Folder
 data "sumologic_admin_recommended_folder" "folder" {}
+
+# Create a folder underneath the Admin Recommended Folder (which requires Admin Mode)
+resource "sumologic_folder" "test" {
+  provider    = sumologic.admin
+  name        = "test"
+  description = "A test folder"
+  parent_id   = data.sumologic_admin_recommended_folder.folder.id
+}
 ```