Update H2 structure for about topics

[sdwheeler]

PR Summary

Update H2 structure for about topics

• Fixes AB#491901

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 contributors guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

PoliCheck Scan Report

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✅ No issues found

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[learn-build-service-prod]

Learn Build status updates of commit db9b71c:

✅ Validation status: passed

File	Status	Preview URL	Details
dsc/dsc-1.1/PSDesiredStateConfiguration/About/about_Classes_and_DSC.md	✅Succeeded	View (dsc-1.1)
dsc/dsc-2.0/PSDesiredStateConfiguration/About/about_Classes_and_DSC.md	✅Succeeded	View (dsc-2.0)

For more details, please refer to the build report.