Update README.md

Author: tangzx

README.md

@@ -1,4 +1,4 @@
-# EmmyLua for VSCode
+# EmmyLua for VSCode (Unstable)
 
 [![Online EmmyLua Doc](https://img.shields.io/badge/emmy-doc-46BC99.svg?style=flat-square)](https://emmylua.github.io)
 [![donate](https://img.shields.io/badge/donate-emmy-FF69B4.svg?style=flat-square)](https://emmylua.github.io/donate.html)
@@ -16,4 +16,4 @@
 
 ### 1.0.0
 
-Initial release of ...
+Initial release of ...