Added additional explanation to exportable param
Added additional explanation to exportable param

spring-cloud/spring-cloud-sleuth,spring-cloud/spring-cloud-sleuth,marcingrzejszczak/spring-cloud-sleuth,spring-cloud/spring-cloud-sleuth,spring-cloud/spring-cloud-sleuth,marcingrzejszczak/spring-cloud-sleuth,marcingrzejszczak/spring-cloud-sleuth,marcingrzejszczak/spring-cloud-sleuth,spring-cloud/spring-cloud-sleuth