Add docs about WinCompat DenyList

[anmenaga]

Documentation Issue

Add info about deny list setting of WinCompat.

Context of the issue

• URL to the article (Docs or GitHub URL): https://github.com/MicrosoftDocs/PowerShell-Docs/blob/staging/reference/7.0/Microsoft.PowerShell.Core/About/about_Windows_PowerShell_Compatibility.md

• Issue affects the following content (check all that apply):

  Cmdlet reference & about_ topics

  • Version 7.x preview content
  • Version 7.0 content
  • Version 6 content
  • Version 5.1 content

  Conceptual articles

  • Fundamental conceptual articles
  • Script sample articles
  • DSC articles
  • Gallery articles
  • JEA articles
  • WMF articles
  • SDK articles

• Is the issue specific to a platform (Y/N - Win/macOS/Linux):

[cofecatt]

added the issue-question label 9 days ago