Propose Code Owners talk and demo

This is basically the same demo that was shown at the virtual
contributor summit in June 2021, but since the audience of the user
summit is different/larger it may make sense to repeat the talk here.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: If9e105d762b166ac916ca7f66a7b9ea61ea418ea
3 files changed