Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -95,7 +95,7 @@ build-services-docker:
   script:
     - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json
     - services="broker authorizer discovery receiver file-transfer"
-    - >
+    - |
       for service in $services; do
           service_dir=${service//"-"/"_"}
           # read the dependency list if exists