Update README.md

Author: hoc081098

README.md

@@ -12,6 +12,7 @@
 [![Kotlin](https://img.shields.io/badge/kotlin-1.6.10-blue.svg?logo=kotlin)](http://kotlinlang.org)
 [![Hits](https://hits.seeyoufarm.com/api/count/incr/badge.svg?url=https%3A%2F%2Fgithub.com%2FKotlin-Android-Open-Source%2FMVI-Coroutines-Flow&count_bg=%2379C83D&title_bg=%23555555&icon=&icon_color=%23E7E7E7&title=hits&edge_flat=false)](https://hits.seeyoufarm.com)
 [![License: MIT](https://img.shields.io/badge/License-MIT-purple.svg)](https://opensource.org/licenses/MIT)
+[![Gitter](https://badges.gitter.im/Kotlin-Android-Open-Source/community.svg)](https://gitter.im/Kotlin-Android-Open-Source/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 
 ## Coroutine + Flow = MVI :heart:
 *   Play MVI with Kotlin Coroutines Flow.