Refresh of ps101 introduction

[mikefrobbins]

PR Summary

Refresh of PowerShell 101 introduction

PR Checklist

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

[learn-build-service-prod[bot]]

Learn Build status updates of commit 2639025:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
reference/docs-conceptual/learn/ps101/00-introduction.md	:white_check_mark:Succeeded	View (>=powershell-5.1)
reference/docs-conceptual/learn/ps101/media/powershell101-150x194.png	:white_check_mark:Succeeded	n/a (file deleted or renamed)
reference/docs-conceptual/learn/ps101/media/powershell101-final-new-210x273.png	:white_check_mark:Succeeded	View (>=powershell-5.1)

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

[learn-build-service-prod[bot]]

Learn Build status updates of commit c742d6c:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
reference/docs-conceptual/learn/ps101/00-introduction.md	:white_check_mark:Succeeded	View (>=powershell-5.1)
reference/docs-conceptual/learn/ps101/media/powershell101-150x194.png	:white_check_mark:Succeeded	n/a (file deleted or renamed)
reference/docs-conceptual/learn/ps101/media/powershell101-final-new-210x273.png	:white_check_mark:Succeeded	View (>=powershell-5.1)

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