Manpages: Missing example of `--ignore` flag in `podman ignore` manpage

[mheon]

--ignore is one of our nicer features for scripting, and it would be nice to include an example of it.

[7h3-3mp7y-m4n]

would love to work on it!

[Raghul-M]

/assign

[Raghul-M]

@mheon Is this issue Title right ? there is no podman ignore command or manpage!

[mheon]

Oops. I believe this was supposed to be podman rm