`DuplexTest.duplexWithAuthChallenge` flaky

[JakeWharton]

On 'testwindows' runner:

 DuplexTest[jvm] > duplexWithAuthChallenge()[jvm] FAILED
    java.util.concurrent.ExecutionException: okhttp3.internal.http2.StreamResetException: stream was reset: CANCEL
        at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
        at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:205)
        at okhttp3.internal.duplex.MockSocketHandler.awaitSuccess(MockSocketHandler.kt:120)
        at okhttp3.DuplexTest.duplexWithAuthChallenge(DuplexTest.kt:549)

        Caused by:
        okhttp3.internal.http2.StreamResetException: stream was reset: CANCEL
            at app//okhttp3.internal.http2.Http2Stream.checkOutNotClosed$okhttp(Http2Stream.kt:702)
            at app//okhttp3.internal.http2.Http2Stream$FramingSink.flush(Http2Stream.kt:631)
            at app//okio.RealBufferedSink.flush(RealBufferedSink.kt:270)
            at app//okhttp3.internal.duplex.MockSocketHandler.sendResponse$lambda$0$0(MockSocketHandler.kt:77)
            at app//okhttp3.internal.duplex.MockSocketHandler.serviceSocketTask$lambda$0(MockSocketHandler.kt:107)
            at java.base@21.0.10/java.util.concurrent.FutureTask.run(FutureTask.java:317)
            at app//okhttp3.internal.duplex.MockSocketHandler.handle(MockSocketHandler.kt:97)
            at app//mockwebserver3.MockWebServer$Http2SocketHandler.writeResponse(MockWebServer.kt:1224)
            at app//mockwebserver3.MockWebServer$Http2SocketHandler.onStream(MockWebServer.kt:1066)
            at app//okhttp3.internal.http2.Http2Connection$ReaderRunnable.headers$lambda$0$0(Http2Connection.kt:700)
            at app//okhttp3.internal.concurrent.TaskQueue$execute$1.runOnce(TaskQueue.kt:112)
            at app//okhttp3.internal.concurrent.TaskRunner$runnable$1.run(TaskRunner.kt:81)
            at java.base@21.0.10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
            at java.base@21.0.10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
            at java.base@21.0.10/java.lang.Thread.run(Thread.java:1583)