Update CHANGELOG.md for duplicate rake task fix

Author: justin808

CHANGELOG.md

@@ -23,6 +23,10 @@ After a release, please make sure to run `bundle exec rake update_changelog`. Th
 
 Changes since the last non-beta release.
 
+#### Fixed
+
+- **Duplicate Rake Task Execution**: Fixed rake tasks executing twice during asset precompilation and other rake operations. Rails Engine was loading task files twice: once via explicit `load` calls in the `rake_tasks` block (Railtie layer) and once via automatic file loading from `lib/tasks/` (Engine layer). This caused `react_on_rails:assets:webpack`, `react_on_rails:generate_packs`, and `react_on_rails:locale` tasks to run twice, significantly increasing build times. Removed explicit `load` calls and now rely on Rails Engine's standard auto-loading behavior. [PR 2052](https://github.com/shakacode/react_on_rails/pull/2052) by [justin808](https://github.com/justin808).
+
 ### [v16.2.0.beta.8] - 2025-11-16
 
 #### Added