Update README

Author: rainboyan

README.md

@@ -4,7 +4,7 @@
 [![Grace on X](https://img.shields.io/twitter/follow/graceframework?style=social)](https://twitter.com/graceframework)
 
 [![Groovy Version](https://img.shields.io/badge/Groovy-4.0.24-blue?style=flat&color=4298b8)](https://groovy-lang.org/releasenotes/groovy-4.0.html)
-[![Grace Version](https://img.shields.io/badge/Grace-2023.2.0-blue?style=flat&color=f49b06)](https://github.com/graceframework/grace-framework/releases/tag/v2023.2.0-M1)
+[![Grace Version](https://img.shields.io/badge/Grace-2023.2.0-blue?style=flat&color=f49b06)](https://github.com/graceframework/grace-framework/releases/tag/v2023.2.0-RC1)
 [![Spring Boot Version](https://img.shields.io/badge/Spring_Boot-3.2.12-blue?style=flat&color=6db33f)](https://github.com/spring-projects/spring-boot/releases/tag/v3.2.12)
 
 # Grace Database Migration Plugin