Fix CI badge in README.md

Author: Flova

README.md

@@ -2,7 +2,7 @@
 
 # Bit-Bots Software Stack
 
-[![Test if all packages build](https://github.com/bit-bots/bitbots_main/actions/workflows/build.yml/badge.svg)](https://github.com/bit-bots/bitbots_main/actions/workflows/build.yml)
+[![Build & Test](https://github.com/bit-bots/bitbots_main/actions/workflows/ci.yml/badge.svg)](https://github.com/bit-bots/bitbots_main/actions/workflows/ci.yml)
 [![ROS Version Iron](https://img.shields.io/badge/ROS%20Version-Iron-ab8c71)](https://docs.ros.org/en/iron/index.html)
 
 This git repository contains all RoboCup-related code and documentation from the Hamburg Bit-Bots team.