docker-run man page has screwed up indenting on --net option

This patch fixes the indenting.

Docker-DCO-1.1-Signed-off-by: Dan Walsh <dwalsh@redhat.com> (github: rhatdan)
kr/pty: vendor upstream 05017fcccf

Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com>
Merge pull request #9713 from unclejack/bump_vendored_kr_pty

kr/pty: vendor upstream 05017fcccf
Merge pull request #9711 from rhatdan/man

docker-run man page has screwed up indenting on --net option