Change H2 case in about articles

[sdwheeler]

Change H2 case in about articles

• Fixes AB#492692

[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 issues. Other issues are also a high priority. 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 7766dd7:

✅ Validation status: passed

File	Status	Preview URL	Details
powershell-gallery/powershellget-3.x/Microsoft.PowerShell.PSResourceGet/About/about_PSResourceGet_Group_Policy.md	✅Succeeded	View (powershellget-3.x)
powershell-gallery/powershellget-3.x/Microsoft.PowerShell.PSResourceGet/About/about_PSResourceGet.md	✅Succeeded	View (powershellget-3.x)

For more details, please refer to the build report.