Update changelog

Author: dotuancd

CHANGELOG.md

@@ -5,7 +5,7 @@
 ## [v1.0.1 - 2020-09-22](https://github.com/SepteniTechnology/laravel-kafka/compare/v1.0.0...v1.0.1)
 
 ### Changed
-- Using config from env variables
+- Using config from env `KAFKA_BROKERS` variables
 
 ## [v1.0.0 - 2020-09-19](https://github.com/SepteniTechnology/laravel-kafka/tree/v1.0.0)
 ### Added