chore: detekt: 불러온 apiKey는 notnull

아니 가만히 냅둬도 String! 인데 왜 must not be null이여

app/build.gradle.kts

@@ -35,7 +35,6 @@ dependencies {
     implementation(libs.timber)
 }
 
-@Suppress
 fun getApiKey(propertyKey: String): String {
-    return gradleLocalProperties(rootDir).getProperty(propertyKey)
+    return gradleLocalProperties(rootDir).getProperty(propertyKey)!!
 }