docs: Move iOS use_modular_headers note to Changes; reorder Unreleased

Antonis review nit: the use_modular_headers! requirement is a
user-facing Podfile change on older RN versions, not internal-only —
promote it from ### Internal into ### Changes alongside the visionOS
setCurrentScreen note. Also reorder the Unreleased sections to the
usual Features / Changes / Fixes / Internal layout used elsewhere in
this file.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: alwx

CHANGELOG.md

@@ -8,22 +8,23 @@
 
 ## Unreleased
 
-### Changes
-
-- **visionOS:** breadcrumbs no longer include the current screen name. sentry-cocoa's new hybrid-SDK `SentryInternalScreenApi` (which replaces the deprecated `PrivateSentrySDKOnly.setCurrentScreen:`) is gated to iOS/tvOS only, so the bridge stubs the setter on visionOS. Other visionOS behaviour (frames tracking, RNSScreen swizzle) is unchanged.
-
-### Internal
-
-- Migrate iOS code from the deprecated `PrivateSentrySDKOnly` SPI (and `SentrySwizzle.h` macro) to the new `SentrySDK.internal` Swift API exposed by sentry-cocoa 9.19.0, via a thin in-pod ObjC↔Swift bridge ([#6370](https://github.com/getsentry/sentry-react-native/issues/6370))
-
 ### Features
 
 - Add experimental `extendAppStart`/`finishExtendedAppStart`/`getExtendedAppStartSpan` to extend the standalone app start window and instrument post-init work ([#6392](https://github.com/getsentry/sentry-react-native/pull/6392))
 
+### Changes
+
+- **iOS:** On React Native versions where `React-hermes` (or another RN pod) is not modularized by default (e.g. RN 0.71), add `use_modular_headers!` to your `ios/Podfile` above the `target` block. This is required because the `RNSentry` pod now contains Swift code (the new `RNSentryInternal` bridge over `SentrySDK.internal`) and CocoaPods refuses to integrate a Swift pod against non-modular ObjC dependencies. Newer React Native versions require no change ([#6370](https://github.com/getsentry/sentry-react-native/issues/6370)).
+- **visionOS:** breadcrumbs no longer include the current screen name. sentry-cocoa's new hybrid-SDK `SentryInternalScreenApi` (which replaces the deprecated `PrivateSentrySDKOnly.setCurrentScreen:`) is gated to iOS/tvOS only, so the bridge stubs the setter on visionOS. Other visionOS behaviour (frames tracking, RNSScreen swizzle) is unchanged ([#6370](https://github.com/getsentry/sentry-react-native/issues/6370)).
+
 ### Fixes
 
 - Skip iOS source maps upload on `Debug` builds ([#6405](https://github.com/getsentry/sentry-react-native/pull/6405))
 
+### Internal
+
+- Migrate iOS code from the deprecated `PrivateSentrySDKOnly` SPI (and `SentrySwizzle.h` macro) to the new `SentrySDK.internal` Swift API exposed by sentry-cocoa 9.19.0, via a thin in-pod ObjC↔Swift bridge ([#6370](https://github.com/getsentry/sentry-react-native/issues/6370))
+
 ## 8.17.2
 
 ### Fixes