Update to latest builds fixing "Insecure world writable dir" warnings

* Update to Rubinius 4.14 which fixes some segfaults.

.github/workflows/test.yml

@@ -35,6 +35,8 @@ jobs:
     - run: ruby --version
     - run: ridk version
       if: matrix.os == 'windows-latest' && !startsWith(matrix.ruby, '2.3')
+    - name: Subprocess test
+      run: ruby test_subprocess.rb
     - name: OpenSSL version
       run: ruby -ropenssl -e 'puts OpenSSL::OPENSSL_LIBRARY_VERSION'
     - name: OpenSSL test