(AB-538640) Clarify behavior of Rename-Item when new name item exists

[michaeltlombardi]

PR Summary

This change fixes AB#538640 by clarifying the behavior of Rename-Item when the new name for the item already exists and that Rename-Item -Force doesn't replace the existing item.

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.

[Copilot]

Pull request overview

Updates Rename-Item reference docs to clarify that renaming to an already-existing name does not replace the destination item, including when -Force is used.

Changes:

• Add narrative guidance that Rename-Item cannot replace an existing destination name and suggest Move-Item -Force instead.
• Clarify -Force parameter behavior to explicitly note it doesn’t replace an existing item named by -NewName.
• Refresh ms.date metadata across supported versioned references.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
reference/7.6/Microsoft.PowerShell.Management/Rename-Item.md	Adds/clarifies guidance around non-overwriting rename behavior and updates metadata date.
reference/7.5/Microsoft.PowerShell.Management/Rename-Item.md	Same clarification for 7.5 docs plus metadata date update.
reference/7.4/Microsoft.PowerShell.Management/Rename-Item.md	Same clarification for 7.4 docs plus metadata date update.
reference/5.1/Microsoft.PowerShell.Management/Rename-Item.md	Same clarification for Windows PowerShell 5.1 docs plus metadata date update.

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[learn-build-service-prod]

PoliCheck Scan Report

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[learn-build-service-prod]

Learn Build status updates of commit 83e64a3:

✅ Validation status: passed

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

For more details, please refer to the build report.

[sdwheeler]

LGTM