chore: trailing | undefined in types.

[threepointone]

This was bothering me, so just a quick mechanical cleanup. In all the types we define, putting | undefined at the end instead of the beginning to be consistent.

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No changeset here, no functional changes.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 0964b55

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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.developers.workers.dev/runs/2177037344/npm-package-wrangler-816

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

npm install --save-dev https://prerelease-registry.developers.workers.dev/prs/816/npm-package-wrangler-816

Or you can use npx with this latest build directly:

npx https://prerelease-registry.developers.workers.dev/runs/2177037344/npm-package-wrangler-816 dev path/to/script.js

[threepointone]

Weird test failure https://github.com/cloudflare/wrangler2/runs/6048122620?check_suite_focus=true

[threepointone]

Landing this because it's safe and and it's the weekend and I don't want folks to be rebasing later.