feat: use rules instead of only in gitlab-ci script

.gitlab-ci.yml

@@ -25,8 +25,9 @@ test:
 # This will actually deploy the web site when pushing to master
 pages:
   stage: deploy
-  only:
-  - master  
+  rules:
+    # Run only on branch named "latest"
+    - if: $CI_COMMIT_BRANCH == "latest"
   script:
   - mv build public
   - echo "Your website is available at $CI_PAGES_URL"
@@ -41,5 +42,7 @@ release:
   script:
     - mkdir -p ~/.gem && echo "$API_KEY_BASE64" | base64 --decode > ~/.gem/credentials && chmod 0600 ~/.gem/credentials
     - gem build jekyll-theme-lcsb-default.gemspec && gem push jekyll-theme-lcsb-default*.gem
-  only:
-    - tags
+  rules:
+    # Run only on master...
+    - if: $CI_COMMIT_TAG
+