In #251 (after moving to GitHub actions), we consistently get this test failure on Windows.

[ERROR] Failures: 
[ERROR]   SpannerRetryHelperTest.testExceptionWithRetryInfo:218 expected to be true
[INFO] 
[ERROR] Tests run: 3581, Failures: 1, Errors: 0, Skipped: 0

I will merge in #251 to cleanup the README but it would be good if we can investigate this test failure.