ci: extend the timeout on BundleController.test.ts "custom build" test to reduce CI flakiness

[petebacondarwin]

This test keeps timing out in CI, which is just infuriating. So hopefully doubling the timeout will make it better.

E.g. https://github.com/cloudflare/workers-sdk/actions/runs/12191905934/job/34011610082?pr=7439#step:5:968

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[github-actions]

A wrangler prerelease is available for testing. You can install this latest build in your project with:

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12196387940/npm-package-wrangler-7473

You can reference the automatically updated head of this PR with:

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/7473/npm-package-wrangler-7473

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npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12196387940/npm-package-wrangler-7473 dev path/to/script.js

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npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12196387940/npm-package-create-cloudflare-7473 --no-auto-update

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12196387940/npm-package-cloudflare-kv-asset-handler-7473

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npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12196387940/npm-package-cloudflare-workers-editor-shared-7473

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12196387940/npm-package-cloudflare-workers-shared-7473

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12196387940/npm-package-cloudflare-workflows-shared-7473

Note that these links will no longer work once the GitHub Actions artifact expires.

---

wrangler@3.92.0 includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	workspace:*	3.20241106.2
workerd	1.20241205.0	1.20241205.0
workerd --version	1.20241205.0	2024-12-05

Please ensure constraints are pinned, and miniflare/workerd minor versions match.