Add Stephen Connolly as a maintainer
Add Stephen Connolly as a maintainer

Branch source, branch API, and scm API typically.

[Fix JENKINS-49160] update maintainer information

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