Fix attribute usage sections

[gewarren]

Fixes #8972.

[learn-build-service-prod]

Learn Build status updates of commit e001b0d:

❌ Validation status: errors

Please follow instructions here which may help to resolve issue.

File	Status	Preview URL	Details
	❌Error		Details

• Line 0, Column 0: [Error: committish-not-found] Can't find branch, tag, or commit 'main' for repo https://github.com/Microsoft/templates.docs.msft.

For more details, please refer to the build report.

If you see build warnings/errors with permission issues, it might be due to single sign-on (SSO) enabled on Microsoft's GitHub organizations. Please follow instructions here to re-authorize your GitHub account to Learn Build.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[BillWagner]

closing and reopening for a fresh CI build.

[BillWagner]

This LGTM @gewarren

Let's

[learn-build-service-prod]

Learn Build status updates of commit e001b0d:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Windows/SystemParameters.xml	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel