Wrong multiplier value in retry delay function example

[zerda]

Hi, there is a typo in the README.md file at 11.1. Retry Delay Function.

final double multiplier = 0.5;
final int baseDelaySecond = 1;

ParallelConsumerOptions.<String, String>builder()
        .retryDelayProvider(recordContext -> {
            int numberOfFailedAttempts = recordContext.getNumberOfFailedAttempts();
            long delayMillis = (long) (baseDelaySecond * Math.pow(multiplier, numberOfFailedAttempts) * 1000);
            return Duration.ofMillis(delayMillis);
        });

While the multiplier is set to 0.5, it results in delay being always less than 1s, and decreasing at every call. This does not adhere to the exponential backoff strategy.

Failed Attempts	Delay (ms)
1	1*0.5^1*1000 = 500
2	1*0.5^2*1000 = 250
3	1*0.5^3*1000 = 125