[maven-release-plugin] prepare release git-4.0.0-beta12
[maven-release-plugin] prepare release git-4.0.0-beta12

martinda/git-plugin,v1v/git-plugin,MarkEWaite/git-plugin,martinda/git-plugin,v1v/git-plugin,MarkEWaite/git-plugin,jenkinsci/git-plugin,jenkinsci/git-plugin,martinda/git-plugin,MarkEWaite/git-plugin,v1v/git-plugin,MarkEWaite/git-plugin,jenkinsci/git-plugin,jenkinsci/git-plugin