compose: spec typo/clarity fixes
compose: spec typo/clarity fixes

From Dora in code review

Co-authored-by: Dockertopia <bbe0206415e7cebc4a1cf6d4c7f702a7caf8d055@users.noreply.github.com>
thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io