Add missing space and fix incorrect backtick

[michael-hollingsworth]

PR Summary

Add missing space and fix incorrect backtick

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

This PR makes small formatting corrections in the about_PSItem documentation to improve readability and ensure inline code is rendered correctly.

Changes:

• Fixes incorrect inline-code formatting for $PSItem by using proper backticks.
• Adds a missing space between an inline code span and the word “cmdlet”.

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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.

✅ No issues found

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[learn-build-service-prod]

Learn Build status updates of commit fa217b9:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/7.6/Microsoft.PowerShell.Core/About/about_PSItem.md	✅Succeeded	View (powershell-7.6)

For more details, please refer to the build report.