Update PnP PowerShell overview

[VesaJuvonen]

Reviewed content and updated with latest information.

[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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Information: PoliCheck | Severity Guidance | Term
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[learn-build-service-prod]

Learn Build status updates of commit 8f9041e:

✅ Validation status: passed

File	Status	Preview URL	Details
sharepoint/docs-conceptual/sharepoint-pnp/sharepoint-pnp-cmdlets.md	✅Succeeded	View

For more details, please refer to the build report.

[Mengke-Gh]

Vesa, would you add the ms.reviewer field?

ms.reviewer: VesaJuvonen