Use rubygems/release-gem action (#54)

See: https://blog.rubygems.org/2023/12/14/trusted-publishing.html

Author: jgarber623

.github/workflows/publish.yml

@@ -10,19 +10,19 @@ jobs:
     uses: ./.github/workflows/ci.yml
   publish-to-rubygems:
     name: Publish to RubyGems
+    permissions:
+      contents: write
+      id-token: write
     needs: ci
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           bundler-cache: true
-      - run: |
-          mkdir -p $HOME/.gem
-          touch $HOME/.gem/credentials
-          chmod 0600 $HOME/.gem/credentials
-          printf -- "---\n:rubygems_api_key: ${{ secrets.RUBYGEMS_TOKEN }}\n" > $HOME/.gem/credentials
-      - run: bundle exec rake release
+      - uses: rubygems/release-gem@v1
+        with:
+          await-release: false
   publish-to-github-packages:
     name: Publish to GitHub Packages
     permissions: