change (ci): now CI docker image is sourced from...

change (ci): now CI docker image is sourced from https://hub.docker.com/r/paritytech/ink-ci-linux (#396)

.gitlab-ci.yml

@@ -16,7 +16,7 @@ variables:
   GIT_DEPTH:                       100
   CARGO_TARGET_DIR:                "/ci-cache/${CI_PROJECT_NAME}/targets/${CI_COMMIT_REF_NAME}/${CI_JOB_NAME}"
   CI_SERVER_NAME:                  "GitLab CI"
-  REGISTRY:                        registry.parity.io/parity/infrastructure/scripts
+  REGISTRY:                        "paritytech"
   ALL_CRATES:                      "core alloc prelude primitives lang lang/macro"
 
 .collect-artifacts:                &collect-artifacts