Bump mailer from 1.17 to 391.ve4a_38c1b_cf4b_#5

dependabot[bot] wants to merge 1 commit into

masterblendle/kubernetes-plugin:masterfrom

dependabot/maven/org.jenkins-ci.plugins-mailer-391.ve4a_38c1b_cf4b_blendle/kubernetes-plugin:dependabot/maven/org.jenkins-ci.plugins-mailer-391.ve4a_38c1b_cf4b_Copy head branch name to clipboard