chore: Move feature flag fix changelog entry to Unreleased (#6048)

The entry for #5989 landed under the 8.54.0 section, but that release was
cut on 2026-08-27 while the fix merged on 2026-09-02, so it ships in the
next release instead.

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

Author: runningcode

CHANGELOG.md

@@ -19,6 +19,7 @@
   - Scopes that are explicitly made current, e.g. via `Sentry.setCurrentScopes` or the `SentryContext` coroutine integration, are now also honoured when `globalHubMode` is enabled
   - `Sentry.pushScope`, `Sentry.pushIsolationScope` and `Sentry.popScope` remain no-ops when `globalHubMode` is enabled
 - Drop the `profiler_id` from transactions and spans when no Perfetto profile covers them, e.g. when Android's `ProfilingManager` rate limits the profiling request ([#6015](https://github.com/getsentry/sentry-java/pull/6015))
+- Prevent events from being dropped when feature flags are added while an event is being captured ([#5989](https://github.com/getsentry/sentry-java/pull/5989))
 
 ### Internal
 
@@ -52,7 +53,6 @@
 
 - Prevents inclusion of `null.` prefix before default-package class names when parsing Java and JNI frames from Android ANR thread dumps ([#5979](https://github.com/getsentry/sentry-java/pull/5979))
 - Prevent duplicated breadcrumbs on tombstone-merged native crash events ([#5888](https://github.com/getsentry/sentry-java/pull/5888))
-- Prevent events from being dropped when feature flags are added while an event is being captured ([#5989](https://github.com/getsentry/sentry-java/pull/5989))
 - Prevent a class of Session Replay deadlocks by confining lifecycle state changes to Android's main thread ([#5965](https://github.com/getsentry/sentry-java/pull/5965))
 - Symbolicate tombstone native frames for libraries loaded directly from APKs ([#5992](https://github.com/getsentry/sentry-java/pull/5992))
 - Prevent a deadlock between the app start extension and the Android performance event processor ([#6007](https://github.com/getsentry/sentry-java/pull/6007))