update release workflow to publish ruby gem automatically

Author: rei-moo

.github/workflows/github-release.yml

@@ -8,6 +8,7 @@ on:
 jobs:
   Publish:
     permissions:
+      id-token: write
       contents: write
     runs-on: ubuntu-latest
     if: startsWith(github.ref, 'refs/tags/v')
@@ -26,3 +27,12 @@ jobs:
           release_name: ${{ env.RELEASE_NAME }}
           draft: false
           prerelease: false
+      - uses: actions/checkout@v5
+        with:
+          persist-credentials: false
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@09a7688d3b55cf0e976497ff046b70949eeaccfd 
+        with:
+          bundler-cache: true
+          ruby-version: ruby
+      - uses: rubygems/release-gem@v1