[data-plane]: Bump license-maven-plugin in /data-plane (#801)
[data-plane]: Bump license-maven-plugin in /data-plane (#801)

Bumps license-maven-plugin from 4.0.rc2 to 4.0.

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
knative-sandbox/eventing-kafka-broker,knative-sandbox/eventing-kafka-broker,knative-sandbox/eventing-kafka-broker