🐛 Bug: Branch protection settings still refer to lint_package, not lint_package_json

[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

Back in #695, I'd renamed lint:package to lint:package-json to make the naming more distinct from lint:packages.

Actual

But I never updated the lint_package name in a few places. For consistency, let's switch it to lint_package_json.

Additional Info

No response

[github-actions]

🎉 This is included in version v1.29.32 🎉

The release is available on:

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

Cheers! 📦🚀