updating breaking changes to reflect changes in the Set-SAS definitio…

[dragav]

…n cmdlet

Description

Updating the KeyVault 'breaking changes' file with guidance on transitioning to the new parameters of the Set-AzureKeyVaultManagedStorageSasDefinition cmdlet.

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• 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
• For public API changes to cmdlets:
  • the changes have gone through a cmdlet design review
  • the cmdlet markdown files were generated using the platyPS module

[maddieclayton]

This description looks perfect. Only comment is to remove "Release 4.4.0", as this is done during the release process (put your change directly under #Upcoming breaking changes

Edit: I resolved the merge conflict and removed the header for you. Will merge as soon as build passes.

[markcowl]

on demand run here: https://azuresdkci.westus2.cloudapp.azure.com/view/PowerShell/job/powershell-demand/767/

[maddieclayton]

Merging, as this is just a doc change and doesn't need on demand.