Add "role specification" as requirement for bonded roles in phase-zero.adoc

[csacher]

phase-zero.adoc: https://github.com/bisq-network/docs/blob/master/dao/phase-zero.adoc

In order to ensure the role specification completion of all assigned roles I will add it as a requirement in the phase zero document.

[cbeams]

@csacher, I believe this is a duplicate of bisq-network/bisq-docs#19, yeah? I'll close on your confirmation.

[cbeams]

Your title was better than mine, though :)

[cbeams]

Closing as duplicated by bisq-network/bisq-docs#19 per #54 (comment).