fixed example on New-AzureRmRecoveryServicesAsrProtectableItem.md

[BaileyLawson]

Description

Fixed the example powershell code for New-AzureRmRecoveryServicesAsrProtectableItem.md

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• [NA] The appropriate change log has been updated
• The PR does not introduce breaking changes
• If applicable, the changes made in the PR have proper test coverage
• [NA] For public API changes to cmdlets:
  • [NA] the changes have gone through a cmdlet design review (Microsoft internal partners only)
  • [NA] the cmdlet markdown files were generated using the platyPS module

[adxsdkps]

Can one of the admins verify this patch?

[msftclas]

All CLA requirements met.

[maddieclayton]

@azuresdkci Add to whitelist