add ci for ruby 3.3

.github/workflows/test.yml

@@ -9,13 +9,18 @@ on:
 jobs:
   test:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby:
+          - '3.3'
+          - '3.2'
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.2.2'
+          ruby-version: ${{matrix.ruby}}
           bundler-cache: true
       - name: Test
         run: bundle exec rake test