fix: published files for svelte-migrate

[gtm-nayan]

fixes #9084

Please don't delete this checklist! Before submitting the PR, please make sure you do the following:

• It's really useful if your PR references an issue where it is discussed ahead of time. In many cases, features are absent for a reason. For large changes, please create an RFC: https://github.com/sveltejs/rfcs
• This message body should clearly illustrate what problems it solves.
• Ideally, include a test that fails without this PR but passes with it.

Tests

• Run the tests with pnpm test and lint the project with pnpm lint and pnpm check

Changesets

• If your PR makes a change that should be noted in one or more packages' changelogs, generate a changeset by running pnpm changeset and following the prompts. Changesets that add features should be minor and those that fix bugs should be patch. Please prefix changeset messages with feat:, fix:, or chore:.

Published files with the change:

npm notice 470B   README.md                                     
npm notice 594B   bin.js                                        
npm notice 2.1kB  migrations/package/index.js                   
npm notice 2.2kB  migrations/package/migrate_config.js          
npm notice 4.6kB  migrations/package/migrate_pkg.js             
npm notice 6.7kB  migrations/routes/index.js                    
npm notice 5.3kB  migrations/routes/migrate_page_js/index.js    
npm notice 3.6kB  migrations/routes/migrate_page_server/index.js
npm notice 4.4kB  migrations/routes/migrate_scripts/index.js    
npm notice 5.5kB  migrations/routes/migrate_server/index.js     
npm notice 205B   migrations/routes/tasks.js                    
npm notice 10.2kB migrations/routes/utils.js                    
npm notice 748B   package.json                                  
npm notice 4.8kB  utils.js

[dummdidumm]

Every time.. thanks!