mod syntax

.gitlab-ci.yml

@@ -2,9 +2,6 @@ stages:
   - build
   - review
 
-variables:
-  PRODUCTION_BRANCH: 'master'
-
 Build for review:
     stage: build
     before_script:
@@ -23,8 +20,9 @@ Build for review:
         - public
     variables:
       JEKYLL_ENV: review
-    - if: '$CI_MERGE_REQUEST_SOURCE_BRANCH_NAME'
-      when: always
+    rules:
+      - if: '$CI_MERGE_REQUEST_SOURCE_BRANCH_NAME'
+        when: always
     tags:
       - review-app