Chapter 11 code example attempt call should start with parameter '0' instead of '1'

[pstarliu]

In the code example in section 'Networks are hard'

Otherwise if called with attempt(1), it will reject the promise on the third attempt instead of fourth, and will give up after 750 ms instead of after a second, both contradict with the text following the code example.

[marijnh]

Ah, thanks for spotting that. Attached patch fixes the inconsistency.

[pstarliu]

And I enjoy read your books by the way, I've read the first edition and now halfway on the second edition.