Update Ruby GHA to test against Ruby 3.3.

Fixes #15182

PiperOrigin-RevId: 593899707

Author: zhangskz

.github/workflows/test_ruby.yml

@@ -25,6 +25,7 @@ jobs:
           - { name: Ruby 3.0, ruby: ruby-3.0.2 }
           - { name: Ruby 3.1, ruby: ruby-3.1.0 }
           - { name: Ruby 3.2, ruby: ruby-3.2.0, ffi: NATIVE }
+          - { name: Ruby 3.3, ruby: ruby-3.3.0, ffi: NATIVE }
           # TODO Re-enable these once flakes are fixed
           #- { name: Ruby 3.2, ruby: ruby-3.2.0, ffi: FFI }
           - { name: JRuby 9.4, ruby: jruby-9.4.3.0, ffi: NATIVE }
@@ -40,7 +41,7 @@ jobs:
       - name: Run tests
         uses: protocolbuffers/protobuf-ci/bazel-docker@v2
         with:
-          image: ${{ matrix.image || format('us-docker.pkg.dev/protobuf-build/containers/test/linux/ruby:{0}-6.3.0-66964dc8b07b6d1fc73a5cc14e59e84c1c534cea', matrix.ruby) }}
+          image: ${{ matrix.image || format('us-docker.pkg.dev/protobuf-build/containers/test/linux/ruby:{0}-6.3.0-904cad5249547845454998ca3837a34c71fabf96', matrix.ruby) }}
           credentials: ${{ secrets.GAR_SERVICE_ACCOUNT }}
           bazel-cache: ruby_linux/${{ matrix.ruby }}_${{ matrix.bazel }}
           bazel: test //ruby/... //ruby/tests:ruby_version --test_env=KOKORO_RUBY_VERSION --test_env=BAZEL=true ${{ matrix.ffi == 'FFI' && '--//ruby:ffi=enabled --test_env=PROTOCOL_BUFFERS_RUBY_IMPLEMENTATION=FFI' || '' }}