add spring-boot-starter-actuator

spring-cloud-greenwich.gradle

@@ -32,6 +32,7 @@ dependencies {
     implementation 'org.springframework.cloud:spring-cloud-starter-openfeign'
     implementation 'org.springframework.retry:spring-retry'
     runtimeOnly 'org.springframework.boot:spring-boot-devtools'
+    runtimeOnly 'org.springframework.boot:spring-boot-starter-actuator'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     testImplementation 'org.springframework.security:spring-security-test'
 }