ci: Rename workflow file / Use Ruby 3.3

Author: toshimaru

.github/workflows/deploy.yml

@@ -0,0 +1,22 @@
+name: Deploy
+on:
+  push:
+    branches:
+      - main
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.3
+          bundler-cache: true
+      - name: Jekyll Build
+        run: bundle exec jekyll build
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v4
+        with:
+          personal_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./_site