Fix Az.Media Syntax Errors (#17666)

* Fix Az.Media Syntax Errors

* Fix Az.Media Syntax Errors

Author: CaptainFanZzz

src/Media/Media/help/New-AzMediaServiceStorageConfig.md

@@ -25,7 +25,7 @@ The **New-AzMediaServiceStorageConfig** cmdlet creates a storage account configu
 
 ### Example 1: Create a storage account configuration for the media service cmdlets
 ```powershell
-$StorageAccount = New-AzStorageAccount -ResourceGroupName $ResourceGroupName -Name "Storage1" -Location "East US" -Type "Standard_GRS"
+$StorageAccount = New-AzStorageAccount -ResourceGroupName "ResourceGroup001" -Name "Storage1" -Location "East US" -Type "Standard_GRS"
 
 New-AzMediaServiceStorageConfig -StorageAccountId $StorageAccount.Id -IsPrimary
 ```

src/Media/Media/help/Set-AzMediaService.md

@@ -26,6 +26,7 @@ The **Set-AzMediaService** cmdlet modifies specified properties of an existing m
 
 ### Example 1: Modify an existing media service
 ```powershell
+$StorageAccounts = New-AzStorageAccount -ResourceGroupName "ResourceGroupName001" -Name "Storage1" -Location "East US" -Type "Standard_GRS"
 $Tags = @{"tag1" = "value1"; "tag2" = "value2"}
 Set-AzMediaService -ResourceGroupName "ResourceGroup123" -AccountName "MediaService001" -Tag $Tags -StorageAccounts $StorageAccounts
 ```