fix image names

vs_starter/templates/docker-compose.instance.yml

@@ -86,7 +86,7 @@ services:
     networks:
       - extnet
   cache:
-    image: registry.gitlab.eox.at/esa/vs/cache:{{ docker_image_versions['registry.gitlab.eox.at/vs/cache'] }}
+    image: registry.gitlab.eox.at/vs/cache:{{ docker_image_versions['registry.gitlab.eox.at/vs/cache'] }}
     deploy:
       labels:
         - "traefik.http.middlewares.cache-stripprefix.stripprefix.prefixes=/cache"