chore: add warn of v1.0.0

Author: sotazum

README.md

@@ -8,6 +8,10 @@
 
 <a href="./README_ja.md"><img alt="日本語のREADME" src="https://img.shields.io/badge/日本語-d9d9d9"></a>
 
+:::note warn
+Now we are preparing to support Dify v1.0.0. Please wait and look forward!
+:::
+
 ## Overview
 This repository allows you to automatically set up Google Cloud resources using Terraform and deploy Dify in a highly available configuration.