Update README.md

URL auf neue gitlab Installation angepasst

README.md

@@ -5,7 +5,7 @@ A docker image is provided to run a demo version of the reg-app. It can be used
 ```sh
 mkdir regapp-docker
 cd regapp-docker
-wget 'https://git.scc.kit.edu/reg-app/regapp-docker/-/raw/main/docker-compose.yml'
+wget 'https://gitlab.kit.edu/reg-app/regapp-docker/-/raw/main/docker-compose.yml'
 docker-compose up
 ```