update README with OSS Meetup information (#890)
update README with OSS Meetup information (#890)

Signed-off-by: Christopher Phillips <847f2b61d5c621bb08ee2878f5b10553750df394@anchore.com>
anchore/syft,anchore/syft,anchore/syft,anchore/syft,anchore/syft,anchore/syft,anchore/syft