Correct order through stages

.gitlab-ci.yml

@@ -1,9 +1,15 @@
+stages:
+  - site
+  - image
+
 build-site:
+  stage: site
   image: registry.gitlab.com/pages/hugo/hugo_extended:latest
   script:
    - hugo
 
 build-image:
+  stage: image
   image:
     name: gcr.io/kaniko-project/executor:debug
     entrypoint: [""]