(AB-538641) Clarify Expand-Archive only applies to zip files

[michaeltlombardi]

PR Summary

This change fixes AB#538641 by clarifying that the Expand-Archive cmdlet only applies to .zip files. It also makes the description and synopsis consistent.

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 contributor's guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

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[learn-build-service-prod]

Learn Build status updates of commit 7bc441a:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Archive/Expand-Archive.md	✅Succeeded	View (powershell-5.1)
reference/7.4/Microsoft.PowerShell.Archive/Expand-Archive.md	✅Succeeded	View (powershell-7.4)
reference/7.5/Microsoft.PowerShell.Archive/Expand-Archive.md	✅Succeeded	View (powershell-7.5)
reference/7.6/Microsoft.PowerShell.Archive/Expand-Archive.md	✅Succeeded	View (powershell-7.6)

For more details, please refer to the build report.

[Copilot]

Pull request overview

Clarifies the Expand-Archive documentation to explicitly state it only supports ZIP (.zip) archives, and aligns wording across multiple versioned reference docs.

Changes:

• Add a statement that Expand-Archive only works with ZIP archives (typically .zip).
• Update the synopsis in some versions to say “ZIP archive file” instead of “archive (zipped) file”.
• Add/standardize additional explanatory text about the underlying .NET ZIP API in some versions.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
reference/7.6/Microsoft.PowerShell.Archive/Expand-Archive.md	Adds ZIP-only clarification plus additional ZIP API details.
reference/7.5/Microsoft.PowerShell.Archive/Expand-Archive.md	Updates synopsis to “ZIP archive file” and adds ZIP-only clarification plus ZIP API details.
reference/7.4/Microsoft.PowerShell.Archive/Expand-Archive.md	Adds ZIP-only clarification to existing description section.
reference/5.1/Microsoft.PowerShell.Archive/Expand-Archive.md	Updates synopsis to “ZIP archive file” and adds ZIP-only clarification plus ZIP API details.

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[sdwheeler]

LGTM