fix: use exact Ruby 3.0.0 version in CI to match gemspec requirement

Author: nicolaiarocci

.github/workflows/release.yml

@@ -33,18 +33,13 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.0'
+          ruby-version: '3.0.0'
           bundler-cache: true
 
       - name: Build gem
         run: gem build invoicetronic_sdk.gemspec
 
       - name: Publish to RubyGems
-        run: |
-          mkdir -p $HOME/.gem
-          touch $HOME/.gem/credentials
-          chmod 0600 $HOME/.gem/credentials
-          printf -- "---\n:rubygems_api_key: ${GEM_HOST_API_KEY}\n" > $HOME/.gem/credentials
-          gem push *.gem
-        env:
-          GEM_HOST_API_KEY: ${{ secrets.RUBYGEMS_API_KEY }}
+        uses: rubygems/release-gem@v1
+        with:
+          gem-name: invoicetronic_sdk