fix(create-cloudflare): use correct start command

[Cherry]

What this PR solves / how to test:

C3 would recommend to use npm run dev previously instead of npm run start, which is what all the templates use. Happy to invert this if preferred.

Author has included the following, where applicable:

• Changeset (Changeset guidelines)

Reviewer is to perform the following, as applicable:

• Checked for inclusion of relevant tests
• Checked for inclusion of a relevant changeset
• Checked for creation of associated docs updates
• Manually pulled down the changes and spot-tested

[changeset-bot]

🦋 Changeset detected

Latest commit: 326529b

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

This PR includes changesets to release 1 package

Name	Type
create-cloudflare	Patch

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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/5018604001/npm-package-wrangler-3291

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

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/3291/npm-package-wrangler-3291

Or you can use npx with this latest build directly:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/5018604001/npm-package-wrangler-3291 dev path/to/script.js

Additional artifacts:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/5018604001/npm-package-cloudflare-pages-shared-3291

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

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@bd0a422). Click here to learn what that means.
The diff coverage is n/a.

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  Hits            ?     8301           
  Misses          ?     2702           
  Partials        ?        0           

[petebacondarwin]

Note this only applies to configs that do not specify a devCommand explicitly.