Update README.md

Author: 0x676e67

README.md

@@ -1,5 +1,6 @@
 # rquest-util
 
+[![CI](https://github.com/0x676e67/rquest-util/actions/workflows/ci.yml/badge.svg)](https://github.com/0x676e67/rquest-util/actions/workflows/ci.yml)
 [![MIT licensed](https://img.shields.io/badge/license-GPL3.0-blue.svg)](./LICENSE)
 [![crates.io](https://img.shields.io/crates/v/rquest-util.svg)](https://crates.io/crates/rquest-util)
 [![Released API docs](https://docs.rs/rquest-util/badge.svg)](https://docs.rs/rquest-util)