Fix health related links in README
Fixes:
@@ -475,8 +475,8 @@ Notes:
### Pod Health Indicator
-Spring Boot uses [HealthIndicator](https://github.com/spring-projects/spring-boot/blob/master/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthIndicator.java) to expose info about the health of an application.
-That makes it really useful for exposing health related information to the user and are also a good fit for use as [readiness probes](http://kubernetes.io/docs/user-guide/production-pods/#liveness-and-readiness-probes-aka-health-checks).
+Spring Boot uses [HealthIndicator](https://github.com/spring-projects/spring-boot/blob/master/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpoint.java) to expose info about the health of an application.
+That makes it really useful for exposing health related information to the user and are also a good fit for use as [readiness probes](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/).
The Kubernetes health indicator which is part of the core module exposes the following info:
