maven release v3.1.1 (#3300)
maven release v3.1.1 (#3300)

* [Gradle Release Plugin] - pre tag commit:  'v3.1.1-maven'.

* [Gradle Release Plugin] - new version commit:  'v3.1.2-SNAPSHOT-maven'.

Co-authored-by: chanseokoh <d9194b99f814040ece88e016867af53e61e2cdb5@users.noreply.github.com>
GoogleContainerTools/jib,GoogleContainerTools/jib,GoogleContainerTools/jib,GoogleContainerTools/jib