Fixes #10033 - Document new UnixSocket parameter for web cmdlets

[sdwheeler]

PR Summary

Document new UnixSocket parameter for web cmdlets

• Fixes AB#148285
• Fixes WebCmdlets support -UnixSocket #10033

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 1c342e6:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/7.4/Microsoft.PowerShell.Utility/Invoke-RestMethod.md	✅Succeeded	View (powershell-7.4)
reference/7.4/Microsoft.PowerShell.Utility/Invoke-WebRequest.md	✅Succeeded	View (powershell-7.4)

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[learn-build-service-prod]

Learn Build status updates of commit 88569da:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/7.4/Microsoft.PowerShell.Utility/Invoke-RestMethod.md	✅Succeeded	View (powershell-7.4)
reference/7.4/Microsoft.PowerShell.Utility/Invoke-WebRequest.md	✅Succeeded	View (powershell-7.4)

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