Fixes #12676 - Update release notes for 7.7-p4

[Sean Wheeler (sdwheeler)]

PR Summary

Update release notes for 7.7-p4

• Fixes AB#629982
• Fixes Document New-TemporaryDirectory cmdlet #12676

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.

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[Copilot]

Pull request overview

Updates PowerShell 7.7 preview.4 documentation by refreshing release notes content, fixing a Windows install doc formatting issue, and adding initial reference documentation for the new New-TemporaryDirectory cmdlet.

Changes:

• Update “What’s New in PowerShell 7.7” content for 7.7.0-preview.4 (module versions and notable fixes/features).
• Fix MSIX bundle link formatting in Windows installation instructions.
• Add a new cmdlet reference page for New-TemporaryDirectory.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 2 comments.

File	Description
reference/docs-conceptual/whats-new/What-s-New-in-PowerShell-77.md	Updates 7.7 preview.4 release notes and adds new PR reference links.
reference/docs-conceptual/install/install-powershell-on-windows.md	Cleans up the “Current preview” MSIX link formatting.
reference/7.7/Microsoft.PowerShell.Utility/New-TemporaryDirectory.md	Adds new cmdlet reference documentation for New-TemporaryDirectory.

Suppressed comments (1)

reference/7.7/Microsoft.PowerShell.Utility/New-TemporaryDirectory.md:28

• This file introduces an ## ALIASES section but leaves it empty. No other cmdlet reference pages in this module include an ALIASES section, so this creates a one-off empty heading in the rendered page.

## ALIASES

## DESCRIPTION

---

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[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 and severity-2 issues. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

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[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 and severity-2 issues. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

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[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 and severity-2 issues. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

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[learn-build-service-prod]

Learn Build status updates of commit 4a2a420:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/7.7/Microsoft.PowerShell.Utility/Microsoft.PowerShell.Utility.md	✅Succeeded	View (powershell-7.7)
reference/7.7/Microsoft.PowerShell.Utility/New-TemporaryDirectory.md	✅Succeeded	View (powershell-7.7)
reference/docs-conceptual/install/install-powershell-on-windows.md	✅Succeeded	View (>=powershell-5.1)
reference/docs-conceptual/whats-new/What-s-New-in-PowerShell-77.md	✅Succeeded	View (>=powershell-5.1)

For more details, please refer to the build report.