Update README.md

Author: mies

README.md

@@ -1,6 +1,6 @@
 ![GitHub_headerImage](https://user-images.githubusercontent.com/3262610/221191767-73b8a8d9-9f8b-440e-8ab6-75cb3c82f2bc.png)
 
-## Autometrics is no longer actively maintained.
+## NOTE: Autometrics is no longer actively maintained.
 
 [![Documentation](https://docs.rs/autometrics/badge.svg)](https://docs.rs/autometrics)
 [![Crates.io](https://img.shields.io/crates/v/autometrics.svg)](https://crates.io/crates/autometrics)