fix(utils): better handling of code blocks in link replacement

[Josh-Cena]

Pre-flight checklist

• I have read the Contributing Guidelines on pull requests.
• If this is a code change: I have written unit tests and/or added dogfooding pages to fully verify the new behavior.
• If this is a new API or substantial change: the PR has an accompanying issue (closes Wrong markdown prevents link to get parsed correctly #9045) and the maintainers have approved on my working plan.

Motivation

Test Plan

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Deploy preview: https://deploy-preview-_____--docusaurus-2.netlify.app/

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[github-actions]

⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	PWA	Report
/	🟢 91	🟢 97	🟢 100	🟢 100	🟠 89	Report
/docs/installation	🟠 81	🟢 100	🟢 100	🟢 100	🟠 89	Report

[github-actions]

Size Change: 0 B

Total Size: 1.01 MB

ℹ️ View Unchanged

Filename	Size
website/.docusaurus/globalData.json	101 kB
website/build/assets/css/styles.********.css	113 kB
website/build/assets/js/main.********.js	752 kB
website/build/index.html	41 kB

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[slorber]

Thanks 👍

Not a super fan of those string manipulations on which such edge cases have to be handled, we should try to adopt a more robust solution (#9048)