chore(readme): add EOL note (#201)

Author: arbiv

README.md

@@ -9,6 +9,8 @@
 [![npm version](https://badge.fury.io/js/epsagon-frameworks.svg)](https://badge.fury.io/js/epsagon-frameworks)
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 
+> **Note:**  This repository is archived since Epsagon is no longer supported
+
 # Epsagon Tracing for Node.js frameworks
 
 ![Trace](trace.png)