Fix error on parameters being an object instead of an array

[conico974]

Fix an error for OpenAPI where operation.parameters is incorrectly provided by the validate function from scalar.
Parameters are supposed to be an Array, but for some invalid schema, it will be an object causing the rendering to crash.

[linear]

RND-7599 Incorrect parsing of OpenAPI `operation.parameters`

[changeset-bot]

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Latest commit: 54c0fe6

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[github-actions]

Summary of the deployments:

Version	URL	Status
Vercel	https://gitbook-v2-mvjz8vwdb-gitbook.vercel.app	✅
Cloudflare	https://e016c9eb-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	2v	2c
GitBook	https://gitbook-v2-mvjz8vwdb-gitbook.vercel.app/url/gitbook.com/docs	https://e016c9eb-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://gitbook-v2-mvjz8vwdb-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://e016c9eb-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.gitbook.io/test-gitbook-open

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Build	Status	Details	Updated (UTC)
customers-v2 (Inspect)	✅ No changes detected	-	Sep 4, 2025, 2:59 PM
v2-cloudflare (Inspect)	✅ No changes detected	-	Sep 4, 2025, 3:05 PM
v2-vercel (Inspect)	👍 Changes approved	1 changed	Sep 4, 2025, 3:02 PM