next.js

c1cfee3e - docs(next-config): remove mention of appIsrStatus is on canary (#71695)

docs(next-config): remove mention of appIsrStatus is on canary (#71695) ## Why? [`appIsrStatus`](https://nextjs.org/docs/canary/app/api-reference/next-config-js/devIndicators#appisrstatus-static-indicator) is stable now, so this note is no longer necessary.