Docs: Update note on Next.js ignoring CRA files

[delbaoliveira]

Adding clarity relating to: #66959 (comment)

[samcx]

Thanks for the edit!

The part that's still confusing → "additional iconography other than the favicon"—is this related to all files that are not the ones listed here → https://nextjs.org/docs/app/building-your-application/optimizing/metadata#file-based-metadata? If yes, maybe we can add a link to this, and stating these are the only ones we check.

[delbaoliveira]

Yes, it's related to the favicon.ico file. Added a link.

[samcx]

additional iconography other than the [favicon]

Isn't this implying that we ignoring almost everything besides the favicon, when it's really we ignore everything except the favicon, icon, and apple-icon (bolded ones we should also mention)?

[samcx]

!