Bump docker from 19.03.11 to 19.03.12 in /dockerfiles-builder
Bump docker from 19.03.11 to 19.03.12 in /dockerfiles-builder

Bumps docker from 19.03.11 to 19.03.12.

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
hairyhenderson/dockerfiles