Update Ruby versions used in testing (github-linguist#7059)

Update Ruby vers in testing

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [ '3.2', '3.1', '3.0' ]
+        ruby: [ '3.3', '3.2', '3.1' ]
     steps:
     - uses: actions/checkout@v1
     - name: Set up Ruby
@@ -57,7 +57,7 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '3.2'
+        ruby-version: '3.3'
         bundler-cache: true
     - name: Build
       run: bundle exec rake samples