project-lakitu: update app-emulation/docker to 20.10.3

Update Docker (server part) to the latest release that contains
the fix for CVE-2021-21285

BUG=b/179987370
TEST=presubmit
RELEASE_NOTE=Update docker to 20.10.3

Change-Id: I3ed0e6ad2bdc88d12dc45c55260e7758d28f2044
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/12970
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Dexter Rivera <riverade@google.com>
4 files changed