.github/workflows/release.yml in fb2rb-0.5.0 vs .github/workflows/release.yml in fb2rb-0.6.0

@@ -9,10 +9,10 @@
     steps:
     - uses: actions/checkout@v2
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.7
+        ruby-version: '3.0'
     - name: Publish to RubyGems.org
       uses: dawidd6/action-publish-gem@v1
       with:
         api_key: ${{ secrets.RUBYGEMS_API_KEY }}