Fix font size for build error version status (#69811)
### What?
This PR fixes a text formatting error where the text shown after the
Next.js version is bigger than the version itself.
<img width="768" alt="CleanShot 2024-09-06 at 19 41 08@2x"
src="https://github.com/user-attachments/assets/1ebe9d4d-860d-4f1a-95c4-36bf67e7b87b">
Fixes #69813
Co-authored-by: Sam Ko <sam@vercel.com>
