The colon separator(`:`) of `--security-opt` flag was deprecated
in 1.11.0. However, the subtitle in deprecated docs is missing
so it is placed under the same subtitle as the deprecated `-e` and
`--email` flags.
This fix adds the missing subtitle in deprecated docs.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Upstream-commit: cf0f0c3927
Component: cli