Bump Kaniko to 1.7.0

.gitlab-ci.yml

@@ -6,7 +6,7 @@ docker:
   tags: [docker]
   interruptible: true
   image:
-    name: gcr.io/kaniko-project/executor:debug-v1.3.0
+    name: gcr.io/kaniko-project/executor:v1.7.0-debug
     entrypoint: [""]
   script:
     - mkdir -p /kaniko/.docker