Jekyll 2>&1 | grep -v so maybe it shuts up

.gitlab-ci.yml

@@ -20,7 +20,7 @@ before_script:
   - npm install
   - bundle install
   - ./scripts/ci_fix_baseurl.sh
-  - jekyll build -d public | grep -v 'Using the last argument as keyword parameters is deprecated'
+  - jekyll build -d public 2>&1 | grep -v 'Using the last argument as keyword parameters is deprecated'
   - ./scripts/purgecss.sh public
   - ./scripts/minifycssjs.sh public
   - ./scripts/add_mailinglist_symlink.sh public