Replace "Signed-off-by:" maintainer task with DCO...
Replace "Signed-off-by:" maintainer task with DCO...

...GitHub Action

* CLOUDBLD-766

Signed-off-by: Ben Alkov <945e3ffa8c419b64848c60660cf17a9e7e2880d1@redhat.com>

release-engineering/koji-containerbuild,release-engineering/koji-containerbuild