fix: setup-ruby 버전 1 사용으로 수정

Author: rha6780

.github/workflows/jekyll.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
       - name: Setup Ruby
-        uses: ruby/setup-ruby@086ffb1a2090c870a3f881cc91ea83aa4243d408 # v1.195.0
+        uses: ruby/setup-ruby@v1 # v1.195.0
         with:
           ruby-version: "2.7.2" # Not needed with a .ruby-version file
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically