🐛 Bug: Shiki twoslash error displays are visually offset slightly

[JoshuaKGoldberg]

Bug Report Checklist

• [X] I have searched for related issues and found none that matched my issue.
• [X] This is the appropriate issue form for the bug I would like to report.

Expected

Don't have visual bugs 😄? There should be no text overflow around code snippets or shiki error annotations.

Actual

https://github.com/LearningTypeScript/site/pull/116

Additional Info

No response