Fix the description of SKU in Microsoft.RecoveryServices (#19646)

* Fix the description of SKU

* small fix

Author: asmaskar

specification/recoveryservices/resource-manager/Microsoft.RecoveryServices/stable/2022-04-01/vaults.json

@@ -1028,7 +1028,7 @@
       "type": "object",
       "properties": {
         "name": {
-          "description": "The Sku name.",
+          "description": "Name of SKU is RS0 (Recovery Services 0th version) and the tier is standard tier. They do not have affect on backend storage redundancy or any other vault settings. To manage storage redundancy, use the backupstorageconfig",
           "enum": [
             "Standard",
             "RS0"