Variables within PowerShell commands need to be explained

### Type of issue

Missing information

### Feedback

When I look at the PS commands, there are variables within the examples which are not explained (on what goes into each variable):

1. $ProtectableItems = Get-AzRecoveryServicesAsrProtectableItem -ProtectionContainer **$Container**
2. Get-AzRecoveryServicesAsrProtectableItem -ProtectionContainer **$pc** -FriendlyName **$piFriendlyName**
3. Get-AzRecoveryServicesAsrProtectableItem -ProtectionContainer **$pc** -Name **$piName**

I feel the examples should explain how to get the data for each variable to run the command

### Page URL

https://learn.microsoft.com/en-us/powershell/module/az.recoveryservices/get-azrecoveryservicesasrprotectableitem?view=azps-11.2.0&tryIt=true&source=docs#code-try-5

### Content source URL

https://github.com/Azure/azure-powershell/blob/main/src/RecoveryServices/RecoveryServices/help/Get-AzRecoveryServicesAsrProtectableItem.md

### Author

@mikefrobbins

### Document Id

bf1c237f-b687-f13f-5ac3-155d291aa343