docs(nextjs): Mention the deferred pageload start in the changelog entry

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Author: 2 people

CHANGELOG.md

@@ -33,7 +33,7 @@
 
 - **feat(nextjs): Never emit trace meta tags from a prerender ([#25141](https://github.com/getsentry/sentry-javascript/pull/25141))**
 
-  Pageloads of apps with `cacheComponents` enabled are connected to their server request again. Pages that Next.js prerenders no longer carry trace information, so a cached page can no longer connect visitors to a request that was not theirs. This also applies to ISR pages.
+  Pageloads of apps with `cacheComponents` enabled are connected to their server request again. Pages that Next.js prerenders no longer carry trace information, so a cached page can no longer connect visitors to a request that was not theirs. This also applies to ISR pages. The pageload waits for the trace information when it arrives with the part of the page that streams in after a cached shell.
 
   If you set up OpenTelemetry yourself and register `SentryPropagator`, register `NextSentryPropagator` instead and pass your tracer provider to `markPrerendersOnTracerProvider`, so that your prerendered pages carry no trace information either.