update changelog

Author: manan-jadhav

Diff for: CHANGELOG.md

@@ -3,6 +3,11 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+## [3.8.2] - 2020-12-17
+
+### Changed
+- MongodbQueueServiceProvider does not use the DB Facade anymore [#2149](https://github.com/jenssegers/laravel-mongodb/pull/2149) by [@curosmj](https://github.com/curosmj)
+
 ### Added
 - Laravel 8 support by [@divine](https://github.com/divine).