docs: add coauthors friendly (#1215)

Author: manudeli

README.md

@@ -8,7 +8,7 @@
 
 <div align="center">
 
-[![MIT License](https://img.shields.io/badge/license-MIT-blue.svg?color=green&labelColor=#5D5D5D)](https://github.com/toss/suspensive/blob/main/LICENSE) [![codecov](https://codecov.io/gh/toss/suspensive/graph/badge.svg?token=5PopssACmx)](https://codecov.io/gh/toss/suspensive) [![CodSpeed Badge](https://img.shields.io/endpoint?url=https://codspeed.io/badge.json)](https://codspeed.io/toss/suspensive) ![GitHub stars](https://img.shields.io/github/stars/toss/suspensive?style=social)
+[![MIT License](https://img.shields.io/badge/license-MIT-blue.svg?color=green&labelColor=#5D5D5D)](https://github.com/toss/suspensive/blob/main/LICENSE) [![Coauthors friendly](https://img.shields.io/badge/coauthors-friendly-blue.svg?logo=data:image/svg%2bxml;base64,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)](https://coauthors.me) [![codecov](https://codecov.io/gh/toss/suspensive/graph/badge.svg?token=5PopssACmx)](https://codecov.io/gh/toss/suspensive) [![CodSpeed Badge](https://img.shields.io/endpoint?url=https://codspeed.io/badge.json)](https://codspeed.io/toss/suspensive) ![GitHub stars](https://img.shields.io/github/stars/toss/suspensive?style=social)
 
 </div>