docs(changelog): add tags input array return entry

Author: difernandez

CHANGELOG.md

@@ -7,6 +7,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 #### Breaking changes
 * Defines required ruby version to >=2.7.0 [#460](https://github.com/platanus/activeadmin_addons/pull/460)
 * Nested and search select now use the name of the association instead of the name of id [#462](https://github.com/platanus/activeadmin_addons/pull/462)
+* Tags input now returns an array of strings instead of a string [#469](https://github.com/platanus/activeadmin_addons/pull/469)
 
 #### Fixes
 * Include only items that belong to parent when using collection option in a nested input level [#463](https://github.com/platanus/activeadmin_addons/pull/463)