[dev-overlay] style: version info staleness click text to learn more (#75768)
When the Next.js version is stale and revealing the docs for the version
staleness, remove `(learn more)` and modify the info text to be
clickable.
### Light
https://github.com/user-attachments/assets/cec6c6a1-a788-4c4d-ab20-416217b42c20
### Dark
https://github.com/user-attachments/assets/02e53d84-146b-4508-b877-586a7fb0195e
Closes NDX-637