fix: release workflow uses same setup as test workflow

Use setup-ruby-and-dependencies composite action (same as test workflow)
instead of bare ruby/setup-ruby. This ensures identical environment:
- libvips installed
- Font antialiasing disabled
- Ruby 4.0 (not floating 'ruby' tag)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: pftg

.github/workflows/release.yml

@@ -20,10 +20,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
-      - uses: ruby/setup-ruby@v1
+      - uses: ./.github/actions/setup-ruby-and-dependencies
         with:
-          bundler-cache: true
-          ruby-version: ruby
+          ruby-version: "4.0"
+          cache-apt-packages: true
 
       - name: Verify version
         run: |