Adds a new example to New-SelfSignedCertificate

[ehmiiz]

PR Summary

The New-SelfSignedCertificate documentation lacks an example of how to provide multiple key usages to the cmdlet.
This PR adds an example that does that.

Prior to this PR, the only way of knowing how to provide multiple values to the -KeyUsage parameter, is to understand the parameter syntax, and many IT Admins look for the examples to solve their problem.

• Resolves New example for New-SelfSignedCertificate, clarifies the KeyUsage parameter #3605

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 04d4655:

✅ Validation status: passed

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docset/winserver2022-ps/pki/New-SelfSignedCertificate.md	✅Succeeded	View (WindowsServer2022-ps)

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[learn-build-service-prod]

Learn Build status updates of commit 73a3776:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2022-ps/pki/New-SelfSignedCertificate.md	✅Succeeded	View (WindowsServer2022-ps)

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[JohanFreelancer9]

Copy review - @ehmiiz, kindly commit the minor suggested change. Many thanks.

[learn-build-service-prod]

Learn Build status updates of commit 437727f:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2022-ps/pki/New-SelfSignedCertificate.md	✅Succeeded	View (WindowsServer2022-ps)

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[learn-build-service-prod]

Learn Build status updates of commit 9ae3ce6:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2022-ps/pki/New-SelfSignedCertificate.md	✅Succeeded	View (WindowsServer2022-ps)

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[learn-build-service-prod]

Learn Build status updates of commit 0c2648a:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2022-ps/pki/New-SelfSignedCertificate.md	✅Succeeded	View (WindowsServer2022-ps)

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[get-itips]

Suggested change

	Subject = 'CN=Patti Fuller,OU=UserAccounts,DC=corp,DC=contoso,DC=com'
	Subject = 'CN=Megan Bowen,OU=UserAccounts,DC=corp,DC=contoso,DC=com'

[get-itips]

Suggested change

	'2.5.29.17={text}upn=pattifuller@contoso.com' )
	'2.5.29.17={text}upn=meganb@contoso.com' )

[get-itips]

Please see my suggestions thanks

[learn-build-service-prod]

Learn Build status updates of commit e533039:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2022-ps/pki/New-SelfSignedCertificate.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