Update .gitlab-ci.yml

.gitlab-ci.yml

-# This file is a template, and might need editing before it works on your project.
-# Full project: https://gitlab.com/pages/plain-html
 image: ruby:2.7
+
 pages:
-  stage: deploy
   script:
     - gem install bundler
     - bundle install
     - bundle exec jekyll build -d public
-    - mkdir .public
-    - cp -r * .public
-    - mv .public public
-    
   artifacts:
     paths:
       - public
-  only:
-    - main