chore: update @hashicorp/platform-markdown-utils

[dstaley]

🎟️ Asana Task
🔍 Preview Link

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Description

Bumps @hashicorp/platform-markdown-utils to get the latest and greatest a11y features!

PR Checklist 🚀

Items in this checklist may not may not apply to your PR, but please consider each item carefully.

• Add Asana and Preview links above.
• Conduct thorough self-review.
• Add or update tests as appropriate.
• Conduct reasonable cross browser testing for both compatibility and responsive behavior (We have a Sauce Labs account for this, if you don't have access, just ask!).
• Conduct reasonable accessibility review (use the WAS as a guide or an axe browser plugin until we establish more formal checks).
• Identify (in the description above) and document (add Asana tasks on this board) any technical debt that you're aware of, but are not addressing as part of this PR.

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🔍 Inspect: https://vercel.com/hashicorp/react-components/6CnGvdFVUeNW8a8jFXppksHwb4CX
✅ Preview: https://react-components-git-dsbump-markdown-utils-hashicorp.vercel.app

[changeset-bot]

🦋 Changeset detected

Latest commit: a943878

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@hashicorp/react-docs-page	Minor
@hashicorp/react-markdown-page	Minor

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[alexcarpenter]

LGTM 👍🏼