Update Changelog

Author: koic

CHANGELOG.md

@@ -2,6 +2,21 @@
 
 ## master (unreleased)
 
+### New features
+
+* [#586](https://github.com/rubocop/rubocop-rails/pull/586): Add new `Rails/RootJoinChain` cop. ([@leoarnold][])
+* [#571](https://github.com/rubocop/rubocop-rails/issues/571): Add `Rails/DurationArithmetic` cop. ([@pirj][])
+* [#594](https://github.com/rubocop/rubocop-rails/pull/594): Add `Rails/RedundantPresenceValidationOnBelongsTo` cop. ([@pirj][])
+* [#568](https://github.com/rubocop/rubocop-rails/issues/568): Add `Rails/SchemaComment` cop. ([@vitormd][])
+
+### Changes
+
+* [#591](https://github.com/rubocop/rubocop-rails/issues/591): Add `change_column` check to `Rails/ReversibleMigration`. ([@mattmccormick][])
+* Add `remove_reference` check to `Rails/ReversibleMigration`. ([@mattmccormick][])
+* [#576](https://github.com/rubocop/rubocop-rails/pull/576): Mark `Rails/TimeZone` as unsafe auto-correction from unsafe. ([@koic][])
+* [#582](https://github.com/rubocop/rubocop-rails/pull/582): Unmark `AutoCorrect: false` from `Rails/RelativeDateConstant`. ([@koic][])
+* [#580](https://github.com/rubocop/rubocop-rails/pull/580): Unmark `AutoCorrect: false` from `Rails/UniqBeforePluck`. ([@koic][])
+
 ## 2.12.4 (2021-10-16)
 
 ### Bug fixes
@@ -484,3 +499,5 @@
 [@theunraveler]: https://github.com/theunraveler
 [@pirj]: https://github.com/pirj
 [@vitormd]: https://github.com/vitormd
+[@mattmccormick]: https://github.com/mattmccormick
+[@leoarnold]: https://github.com/leoarnold