chore(miniflare): upgrade youch version

[edmundhung]

Fixes DEVX-1979

This upgrades Youch to v4, which gives us better error-cause support and a refreshed error UI with light and dark theme:

---

• Tests
  • Tests included
  • Tests not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: no feature change
• Wrangler V3 Backport
  • Wrangler PR:
  • Not necessary because: not bug fix

[changeset-bot]

🦋 Changeset detected

Latest commit: 9cc8c70

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

This PR includes changesets to release 5 packages

Name	Type
miniflare	Patch
@cloudflare/pages-shared	Patch
@cloudflare/vite-plugin	Patch
@cloudflare/vitest-pool-workers	Patch
wrangler	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

[pkg-pr-new]

create-cloudflare

npm i https://pkg.pr.new/create-cloudflare@9876

@cloudflare/kv-asset-handler

npm i https://pkg.pr.new/@cloudflare/kv-asset-handler@9876

miniflare

npm i https://pkg.pr.new/miniflare@9876

@cloudflare/pages-shared

npm i https://pkg.pr.new/@cloudflare/pages-shared@9876

@cloudflare/unenv-preset

npm i https://pkg.pr.new/@cloudflare/unenv-preset@9876

@cloudflare/vite-plugin

npm i https://pkg.pr.new/@cloudflare/vite-plugin@9876

@cloudflare/vitest-pool-workers

npm i https://pkg.pr.new/@cloudflare/vitest-pool-workers@9876

@cloudflare/workers-editor-shared

npm i https://pkg.pr.new/@cloudflare/workers-editor-shared@9876

wrangler

npm i https://pkg.pr.new/wrangler@9876

commit: 9cc8c70