Fixed a minor typo

[Francewhoa]

Title is self-explained. This is my first commit to Bisq project
on GitHub. All are welcome to let me know if any question or concern :)

This "phase-zero.adoc" document is well written, organized,
even visuals wow :) This doc is very useful to me as newcomer
to get started with the Bisq project.

[cbeams]

Thanks, @Francewhoa. Also, you might be interested in this tweet: https://twitter.com/cbeams/status/944162513482145792

[Francewhoa]

https://twitter.com/cbeams/status/944162513482145792

@cbeams :) Thanks for flagging that challenge. That is Scooby-Doo-weird, LOL (joke ;) Maybe a glitch with github? I actually noticed that during my pull request when reviewing the “Comparing changes”. The diff was not fully highlighted. It's the first time I saw that "glitch" with github. I mean usually the expected result is that the diff is fully highlighted like in this test I did I did today. This allows to quickly and easily tell what is the suggested edit and its exact location. That's the whole point of a diff, LOL ;) Otherwise it's time consuming to read the whole paragraph and manually try to locate the edit.

To narrow down the source of this challenge, today I did a few tests. I was able to reproduce this challenge three times. But only using this forked "phase-zero.adoc" file. I was not able to reproduce this challenge with any other files within the same fork repository.

Anyhow your merge with master was successful. How about keeping this ticket for easy reference in case this challenge happens again in the future. Steps to reproduce at #23. But for now assume it's a one time glitch with github file. Another option to consider is we could call Scooby-Doo and his pals asking them to investigate, LOL ;)