update CI script

.gitlab-ci.yml

@@ -6,7 +6,7 @@ default:
   tags: [ public-docker ]
 
 .kaniko:
-  image: { name: "gcr.io/kaniko-project/executor:v1.6.0-debug", entrypoint: [""] }
+  image: { name: "gcr.io/kaniko-project/executor:debug", entrypoint: [""] }
   before_script:
     - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json
   script: