Update Get-AzRecoveryServicesBackupItem.md (#13719)

Get-AzRecoveryServicesBackupContainer examples used "name" instead of "friendlyname". Name is not a valid parameter for Get-AzRecoveryServicesBackupContainer.

https://docs.microsoft.com/en-us/powershell/module/az.recoveryservices/get-azrecoveryservicesbackupcontainer?view=azps-5.2.0

Author: Spacebjorn

src/RecoveryServices/RecoveryServices/help/Get-AzRecoveryServicesBackupItem.md

@@ -51,7 +51,7 @@ Set the vault context by using the -VaultId parameter.
 
 ```powershell
 PS C:\> $vault = Get-AzRecoveryServicesVault -ResourceGroupName "resourceGroup" -Name "vaultName"
-PS C:\> $Container = Get-AzRecoveryServicesBackupContainer -ContainerType AzureVM -Status Registered -Name "V2VM" -VaultId $vault.ID
+PS C:\> $Container = Get-AzRecoveryServicesBackupContainer -ContainerType AzureVM -Status Registered -FriendlyName "V2VM" -VaultId $vault.ID
 PS C:\> $BackupItem = Get-AzRecoveryServicesBackupItem -Container $Container -WorkloadType AzureVM -VaultId $vault.ID
 ```
 
@@ -62,7 +62,7 @@ The second command gets the Backup item named V2VM in $Container, and then store
 
 ```powershell
 PS C:\> $vault = Get-AzRecoveryServicesVault -ResourceGroupName "resourceGroup" -Name "vaultName"
-PS C:\> $Container = Get-AzRecoveryServicesBackupContainer -ContainerType AzureStorage -Status Registered -Name "StorageAccount1" -VaultId $vault.ID
+PS C:\> $Container = Get-AzRecoveryServicesBackupContainer -ContainerType AzureStorage -Status Registered -FriendlyName "StorageAccount1" -VaultId $vault.ID
 PS C:\> $BackupItem = Get-AzRecoveryServicesBackupItem -Container $Container -WorkloadType AzureFiles -VaultId $vault.ID -FriendlyName "FileShareName"
 ```