fix(schema): remove duplicate @default jsdoc tag

[Lehoczky]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

While checking out the new experimental.watcher option because of the recent speed regression on Windows, I noticed that the option's documentation has two @default tags, one of them incorrect:

Removing the manually written @default tag in packages/schema/src/config/experimental.ts seems to solve the issue.
The config.d.ts before, and then after the changes in this PR:

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.