next.js

cdfdaab6 - docs: correct valid route segments for icon/favicon/apple-icon (#51188)

docs: correct valid route segments for icon/favicon/apple-icon (#51188) Improves the documentation to correctly mention that only favicon is restricted to the root app/ segment. x-ref: [slack](https://vercel.slack.com/archives/C03KAR5DCKC/p1686425241975119)