🐛 Bug: Transition removes footnotes from `README.md`

[JoshuaKGoldberg]

Bug Report Checklist

• I have tried restarting my IDE and the issue persists.
• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Expected

If a repo's README.md has footnotes like:

[^1]: Abc def.

...then they should be preserved during npx create-typescript-app migration.

Actual

https://github.com/JoshuaKGoldberg/ts-function-inliner/pull/206/files#r2027202825 shows one being removed.

Additional Info

🎁

[github-actions]

🎉 This is included in version v2.24.5 🎉

The release is available on:

• GitHub releases
• npm package (@latest dist-tag)

Cheers! 📦🚀