Add Ruby 3.3 to CI matrix

.github/workflows/release.yml

@@ -11,10 +11,10 @@ jobs:
     if: github.repository_owner == 'voxpupuli'
     steps:
       - uses: actions/checkout@v4
-      - name: Install Ruby 3.1
+      - name: Install Ruby 3.3
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.1'
+          ruby-version: '3.3'
       - name: Build gem
         run: gem build --strict --verbose *.gemspec
       - name: Publish gem to rubygems.org

.github/workflows/test.yml

@@ -33,6 +33,7 @@ jobs:
           - "3.0"
           - "3.1"
           - "3.2"
+          - "3.3"
           - jruby-9.4
         puppet:
           - "~> 8.0"