Fix CI badge in README (#3762)

Author: TheJulianJES

README.md

@@ -1,6 +1,6 @@
 # ZHA Device Handlers For Home Assistant
 
-![CI](https://github.com/zigpy/zha-device-handlers/workflows/CI/badge.svg?branch=dev)
+[![CI](https://github.com/zigpy/zha-device-handlers/actions/workflows/ci.yml/badge.svg)](https://github.com/zigpy/zha-device-handlers/actions/workflows/ci.yml)
 [![Coverage Status](https://codecov.io/gh/zigpy/zha-device-handlers/branch/dev/graph/badge.svg)](https://app.codecov.io/gh/zigpy/zha-device-handlers/tree/dev)
 
 ZHA Device Handlers are custom quirks implementations for [Zigpy](https://github.com/zigpy/zigpy), the library that provides the [Zigbee](http://www.zigbee.org) support for the [ZHA](https://www.home-assistant.io/components/zha/) component in [Home Assistant](https://www.home-assistant.io).