Merge pull request #10603 from izeye/patch-49

* pr/10603:
  Fix broken README.adoc

Author: philwebb

README.adoc

@@ -1,4 +1,6 @@
 = Spring Boot image:https://ci.spring.io/api/v1/teams/spring-boot/pipelines/spring-boot/jobs/build/badge["Build Status", link="https://ci.spring.io/teams/spring-boot/pipelines/spring-boot?groups=Build"] image:https://badges.gitter.im/Join Chat.svg["Chat",link="https://gitter.im/spring-projects/spring-boot?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge"]
+:docs: http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference
+
 Spring Boot makes it easy to create Spring-powered, production-grade applications and
 services with absolute minimum fuss. It takes an opinionated view of the Spring platform
 so that new and existing users can quickly get to the bits they need.