Polish "Update endpoint enablement description to describe availability"

See gh-20799

spring-boot-project/spring-boot-docs/src/main/asciidoc/production-ready-features.adoc

@@ -48,10 +48,10 @@ Actuator endpoints let you monitor and interact with your application.
 Spring Boot includes a number of built-in endpoints and lets you add your own.
 For example, the `health` endpoint provides basic application health information.
 
-Each individual endpoint can be <<production-ready-endpoints-enabling-endpoints, enabled or disabled>>.
-An endpoint that is enabled is said to be available if it is exposed (made remotely accessible) over HTTP or JMX.
-To be remotely accessible an endpoint also has to be <<production-ready-endpoints-exposing-endpoints, exposed via JMX or HTTP>>.
-Most applications choose HTTP, where the ID of the endpoint along with a prefix of `/actuator` is mapped to a URL.
+Each individual endpoint can be <<production-ready-endpoints-enabling-endpoints, enabled or disabled>> and <<production-ready-endpoints-exposing-endpoints, exposed (made remotely accessible) over HTTP or JMX>>.
+An endpoint is considered to be available when it is both enabled and exposed.
+The built-in endpoints will only be auto-configured when they are available.
+Most applications choose exposure via HTTP, where the ID of the endpoint along with a prefix of `/actuator` is mapped to a URL.
 For example, by default, the `health` endpoint is mapped to `/actuator/health`.
 
 The following technology-agnostic endpoints are available: