docs: update README.md

SkyLightQP · web-flow · commit ec4f47729b17 · 2025-02-22T17:14:17.000+09:00
diff --git a/README.md b/README.md
@@ -1,4 +1,4 @@
-# maru-backend ![Kotlin](https://img.shields.io/badge/kotlin-%237F52FF.svg?logo=kotlin&logoColor=white) 	![Spring](https://img.shields.io/badge/spring-%236DB33F.svg?logo=spring&logoColor=white)
+# maru-backend ![Kotlin](https://img.shields.io/badge/kotlin-%237F52FF.svg?logo=kotlin&logoColor=white) 	![Spring](https://img.shields.io/badge/spring-%236DB33F.svg?logo=spring&logoColor=white) [![Check ktlint and Run unit tests](https://github.com/SkyLightQP/maru-backend/actions/workflows/ci.yml/badge.svg)](https://github.com/SkyLightQP/maru-backend/actions/workflows/ci.yml)
 
 > 일기장 서비스 - 마루: 나만의 일기를 쓰는 공간.
 

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-# maru-backend ![Kotlin](https://img.shields.io/badge/kotlin-%237F52FF.svg?logo=kotlin&logoColor=white) ![Spring](https://img.shields.io/badge/spring-%236DB33F.svg?logo=spring&logoColor=white)`
	`1`	`+# maru-backend ![Kotlin](https://img.shields.io/badge/kotlin-%237F52FF.svg?logo=kotlin&logoColor=white) ![Spring](https://img.shields.io/badge/spring-%236DB33F.svg?logo=spring&logoColor=white) [![Check ktlint and Run unit tests](https://github.com/SkyLightQP/maru-backend/actions/workflows/ci.yml/badge.svg)](https://github.com/SkyLightQP/maru-backend/actions/workflows/ci.yml)`
`2`	`2`
`3`	`3`	`> 일기장 서비스 - 마루: 나만의 일기를 쓰는 공간.`
`4`	`4`