Update README.md

README.md

@@ -5,6 +5,7 @@
 [![docs.rs](https://img.shields.io/docsrs/rencfs?label=docs.rs)](https://docs.rs/rencfs/)
 [![clippy](https://github.com/radumarias/rencfs/actions/workflows/clippy.yml/badge.svg)](https://github.com/radumarias/rencfs/actions/workflows/check.yml)
 [![test](https://github.com/radumarias/rencfs/actions/workflows/test.yml/badge.svg)](https://github.com/radumarias/rencfs/actions/workflows/test.yml)
+[![codecov](https://codecov.io/gh/radumarias/rencfs/graph/badge.svg?token=NUQI6XGF2Y)](https://codecov.io/gh/radumarias/rencfs)
 [![Discord](https://img.shields.io/discord/1236855443486277653?label=Discord)](https://discord.com/channels/1236855443486277653/1236855448515252306)
 [![Matrix](https://img.shields.io/matrix/rencfs%3Amatrix.org?label=Matrix)](https://matrix.to/#/#rencfs:matrix.org)
 [![Zulip](https://img.shields.io/badge/zulip-join_chat-brightgreen.svg?label=Zulip)](https://rencfs.zulipchat.com)