Replace "wps_2" with "Windows PowerShell"

[Jaykul]

Description

This updates New-AzAutomationDocument, there may be others -- I will follow up and update the PR, but I have a question:

We could probably just say "PowerShell" (which would make this a little more future proof) but I'm reasonably sure these Automation accounts are using Windows PowerShell 5.1 indefinitely, and not PowerShell Core 6 -- is that true?

Further, upon reading the checklist below, I'm not sure if this is the right place to update these...

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 (Microsoft internal partners only)
  • the cmdlet markdown files were generated using the platyPS module

[cormacpayne]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[cormacpayne]

@Jaykul Hey Joel, thanks for the PR 😀

@vrdmr Hey Varad, would you mind confirming the statement made above by @Jaykul and sign-off on the changes made in this PR?

[cormacpayne]

@vrdmr ping