fix(docs): remove non-visible header rendering in TOC

[calebpollman]

Description of changes

Fix rendering of Table of Contents links that are not visible in the current page

Before

After

Issue #, if available

NA

Description of how you validated changes

Manual test

Checklist

• Have read the Pull Request Guidelines
• PR description included

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

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Latest commit: f00dc9a

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