Fix Get-SystemPreferredUILanguage spelling error

[aisgbnok]

PR Summary

Fixes Get-SystemPreferredUILanguage being mispelled as Get-SystemPrefferedUILanguage.

• Fixes Spelling error on "Get-SystemPrefferedUILanguage" should be "Get-SystemPreferredUILanguage" single F.  #3279
• Fixes Get-SystemPrefferedUILanguage in Example is misspelled. #3532

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 a19889a:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2019-ps/languagepackmanagement/Get-SystemPreferredUILanguage.md	✅Succeeded	View (WindowsServer2019-ps)
docset/winserver2022-ps/languagepackmanagement/Get-SystemPreferredUILanguage.md	✅Succeeded	View (WindowsServer2022-ps)

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]

Learn Build status updates of commit db8e6f9:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2019-ps/languagepackmanagement/Get-SystemPreferredUILanguage.md	✅Succeeded	View (WindowsServer2019-ps)
docset/winserver2022-ps/languagepackmanagement/Get-SystemPreferredUILanguage.md	✅Succeeded	View (WindowsServer2022-ps)

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

[scanum]

@tiburd
PR has been copyedited and is ready for final review, could you please check and merge? Thanks!

[learn-build-service-prod]

Learn Build status updates of commit 35ba7ad:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2019-ps/languagepackmanagement/Get-SystemPreferredUILanguage.md	✅Succeeded	View (WindowsServer2019-ps)
docset/winserver2022-ps/languagepackmanagement/Get-SystemPreferredUILanguage.md	✅Succeeded	View (WindowsServer2022-ps)

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