chore: 버전 업데이트 v1.5.2 (1152)

- versionCode: 1151 → 1152

- versionName: 1.5.1 → 1.5.2

- CHANGELOG.md v1.5.2 업데이트 내역 추가

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

app/build.gradle.kts

@@ -20,8 +20,8 @@ android {
  applicationId = "com.example.shiftalarm"
  minSdk = 26
  targetSdk = 35
-        versionCode = 1151
-        versionName = "1.5.1"
+        versionCode = 1152
+        versionName = "1.5.2"
 
  testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
  }