Update @opennextjs/cloudflare to version 1.8.3

[conico974]

Upgrade the @opennextjs/cloudflare dependency to improve functionality and compatibility.

[changeset-bot]

⚠️ No Changeset found

Latest commit: d45d2ba

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Build	Status	Details	Updated (UTC)
customers-v2 (Inspect)	👍 Changes approved	8 changed	Sep 18, 2025, 2:45 PM
v2-cloudflare (Inspect)	👍 Changes approved	1 changed	Sep 18, 2025, 2:49 PM
v2-vercel (Inspect)	✅ No changes detected	-	Sep 18, 2025, 2:35 PM

[github-actions]

Summary of the deployments:

Version	URL	Status
Vercel	https://gitbook-v2-j7c8zft02-gitbook.vercel.app	✅
Cloudflare	https://fa69a38f-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	2v	2c
GitBook	https://gitbook-v2-j7c8zft02-gitbook.vercel.app/url/gitbook.com/docs	https://fa69a38f-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://gitbook-v2-j7c8zft02-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://fa69a38f-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.gitbook.io/test-gitbook-open