Copyedit builds

Trying again since the first PR seems to have been lost.

Docker-DCO-1.1-Signed-off-by: Fred Lifton fred.lifton@docker.com (github: fredlf)
Automated Builds is a single feature.
Is there a reason why we are referring to it in plural - and continue to do so throughout?
(also taking in account that docs follow AmE regs.)