Fix build caching (#2040)

Co-authored-by: Tim Jacomb <21194782+timja@users.noreply.github.com>

Author: basil

docker-compose.yml

@@ -49,7 +49,7 @@ services:
       context: src/main/resources/ath-container
       dockerfile: Dockerfile
       cache_from:
-        - jenkins/ath:latest
+        - type=registry,ref=jenkins/ath:build-cache
     container_name: mvn
     depends_on:
       - firefox