man: reformat docker-run.1.md to prevent linting warnings

Before this patch, lintian would complain about some lines being too long:

    lintian ./*.deb
    ...
    W: docker-ce-cli: groff-message troff:<standard input>:642: warning [p 8, 10.2i, div '3tbd1,1', 0.0i]: cannot break line [usr/share/man/man1/docker-run.1.gz:1]

    groff -t -man ./docker-run.1 > /dev/null
    troff:./docker-run.1:602: warning [p 9, 2.8i]: cannot adjust line
    troff:./docker-run.1:669: warning [p 10, 2.5i, div '3tbd1,1', 0.0i]: cannot break line

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah