Fix crash when integration script fails to render block

[SamyPesse]

No description provided.

[changeset-bot]

🦋 Changeset detected

Latest commit: b64076f

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

This PR includes changesets to release 2 packages

Name	Type
gitbook	Patch
@gitbook/react-contentkit	Patch

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[github-actions]

Summary of the deployments:

Version 1

Version	URL	Status
Latest commit	https://93559ff4.gitbook-open.pages.dev	✅
PR	https://pr3332.gitbook-open.pages.dev	✅

Version 2

Version	URL	Status
Vercel	https://gitbook-v2-7da1bll0q-gitbook.vercel.app	✅
Cloudflare	https://6f4f2a02-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	v1	2v	2c
GitBook	https://93559ff4.gitbook-open.pages.dev/gitbook.com/docs	https://gitbook-v2-7da1bll0q-gitbook.vercel.app/url/gitbook.com/docs	https://6f4f2a02-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://93559ff4.gitbook-open.pages.dev/gitbook.gitbook.io/test-gitbook-open	https://gitbook-v2-7da1bll0q-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://6f4f2a02-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.gitbook.io/test-gitbook-open

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Build	Status	Details	Updated (UTC)
customers-v1 (Inspect)	✅ No changes detected	-	Jun 16, 2025, 5:46 PM
customers-v2 (Inspect)	👍 Changes approved	77 changed	Jun 16, 2025, 5:48 PM
default (Inspect)	✅ No changes detected	-	Jun 16, 2025, 5:48 PM
v2-cloudflare (Inspect)	✅ No changes detected	-	Jun 16, 2025, 5:50 PM
v2-vercel (Inspect)	✅ No changes detected	-	Jun 16, 2025, 5:50 PM