Updated author of azure stack docs

[mikefrobbins]

PR Summary

Updated author of azure stack docs

PR Checklist

• Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• Summary: This PR's summary describes the scope and intent of the change.
• Contributor's Guide: I have read the contributors guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

Learn Build status updates of commit 6aaa68f:

✅ Validation status: passed

File	Status	Preview URL	Details
docfx.json	✅Succeeded
docs-conceptual/azurestackps-1.8.3/overview.md	✅Succeeded	View (azurestackps-1.8.3)
docs-conceptual/azurestackps-2.0.0/overview.md	✅Succeeded	View (azurestackps-2.0.0)
docs-conceptual/azurestackps-2.0.1/overview.md	✅Succeeded	View (azurestackps-2.0.1)
docs-conceptual/azurestackps-2.0.2/overview.md	✅Succeeded	View (azurestackps-2.0.2)
docs-conceptual/azurestackps-2.2.0/overview.md	✅Succeeded	View (azurestackps-2.2.0)

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel