Fix Heading in hint blocks are huge in published content

[zenoachtig]

Also fix flip-heading-hash behaviour which wasn't working anymore

[linear]

RND-8650 Heading in hint blocks are huge in published content

[changeset-bot]

⚠️ No Changeset found

Latest commit: 1381a68

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[argos-ci]

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Build	Status	Details	Updated (UTC)
customers-v2 (Inspect)	👍 Changes approved	1 changed	Nov 14, 2025, 2:09 PM
v2-cloudflare (Inspect)	👍 Changes approved	3 changed	Nov 14, 2025, 1:03 PM
v2-vercel (Inspect)	👍 Changes approved	8 changed	Nov 14, 2025, 2:13 PM

[github-actions]

Summary of the deployments:

Version	URL	Status
Vercel	https://gitbook-v2-765l7kkcq-gitbook.vercel.app	✅
Cloudflare	https://7de1a942-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	2v	2c
GitBook	https://gitbook-v2-765l7kkcq-gitbook.vercel.app/url/gitbook.com/docs	https://7de1a942-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://gitbook-v2-765l7kkcq-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://7de1a942-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.gitbook.io/test-gitbook-open