message: fix(changelog): Adjust heading for 4.8.0 Fixes
diff: ## 4.8.0
  -## Fixes
  +### Fixes
  - Message event can have attached stacktrace ([#2577](https://github.com/getsentry/sentry-react-native/pull/2577))
  - Fixed maximum call stack exceeded error resulting from large payloads ([#2579](https://github.com/getsentry/sentry-react-native/pull/2579))
  