Update README.adoc

Add link to announcement

Author: fabapp2

README.adoc

@@ -1,5 +1,12 @@
-= Spring Boot Migrator (SBM)
+ifdef::env-github[]
+:tip-caption: :bulb:
+:note-caption: :information_source:
+:important-caption: :heavy_exclamation_mark:
+:caution-caption: :fire:
+:warning-caption: :warning:
+endif::[]
 
+= Spring Boot Migrator (SBM)
 
 image:https://img.shields.io/github/license/spring-projects-experimental/spring-boot-migrator[GitHub]
 image:https://img.shields.io/github/v/release/spring-projects-experimental/spring-boot-migrator[GitHub release (latest by date)]
@@ -10,6 +17,11 @@ image:https://img.shields.io/badge/Join-Slack-green?logo=slack&color=007EC6&styl
 image:https://img.shields.io/github/discussions/spring-projects-experimental/spring-boot-migrator?label=GitHub%20discussions&logo=GitHUb&style=for-the-badge[GitHub Discussions]
 image:https://img.shields.io/gitter/room/spring-boot-migrator/community?color=007EC6&logo=gitter&style=for-the-badge[link="https://gitter.im/spring-boot-migrator/community"]
 
+
+IMPORTANT: **We're revamping Spring Boot Migrator. https://github.com/spring-projects-experimental/spring-boot-migrator/discussions/859[Read more here].**
+
+
+
 [quote]
 ____
 Spring Boot Migrator (SBM) aims to help developers upgrade or migrate to https://spring.io/projects/spring-boot[Spring Boot] by providing recipes for automated migrations.