[Storage] Revise Get-AzStorageAccount help example #2 (Azure#19300)

Author: blueww

src/Storage/Storage.Management/help/Get-AzStorageAccountKey.md

@@ -33,11 +33,17 @@ This command gets the keys for the specified Azure Storage account.
 ### Example 2: Get a specific access key for a Storage account
 <!-- Skip: Output cannot be splitted from code -->
 ```
-This command gets a specific key for a Storage account. This command works for Azure PowerShell version 1.4, and later versions.
+This command gets a specific key for a Storage account.
 PS C:\>(Get-AzStorageAccountKey -ResourceGroupName "RG01" -Name "mystorageaccount")| Where-Object {$_.KeyName -eq "key1"}
 
-This command gets a specific key for a Storage account. This command works for Azure PowerShell version 1.3.2, and previous versions.
-PS C:\>(Get-AzStorageAccountKey -ResourceGroupName "RG01" -Name "mystorageaccount").Key1
+KeyName Value             Permissions CreationTime
+------- -----             ----------- ------------
+key1    <KeyValue>        Full             
+
+This command gets a specific key value for a Storage account. 
+PS C:\>(Get-AzStorageAccountKey -ResourceGroupName "RG01" -Name "mystorageaccount")[0].Value
+
+<KeyValue> 
 ```
 
 ### Example 3: Lists the access keys for a Storage account, include the Kerberos keys (if active directory enabled)