replaced the nightly badge with the CRI badge

Signed-off-by: Dmitrii Ustiugov <dmitrii.ustiugov@epfl.ch>

README.md

@@ -1,7 +1,7 @@
 [![build](https://github.com/ease-lab/vhive/workflows/vHive%20build%20tests/badge.svg)](https://github.com/ease-lab/vhive/actions)
 [![Unit Tests](https://github.com/ease-lab/vhive/workflows/vHive%20unit%20tests/badge.svg)](https://github.com/ease-lab/vhive/actions)
 [![Integration Tests](https://github.com/ease-lab/vhive/workflows/vHive%20integration%20tests/badge.svg)](https://github.com/ease-lab/vhive/actions)
-[![Nightly Tests](https://github.com/ease-lab/vhive/workflows/vHive%20nightly%20integration%20tests/badge.svg)](https://github.com/ease-lab/vhive/actions)
+[![vHive CRI tests](https://github.com/ease-lab/vhive/actions/workflows/cri_test.yml/badge.svg)](https://github.com/ease-lab/vhive/actions/workflows/cri_test.yml)
 [![Go Report Card](https://goreportcard.com/badge/github.com/ease-lab/vhive)](https://goreportcard.com/report/github.com/ease-lab/vhive)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)