chore(deps): upgrade jenkins-x-plugins/jx-admin to version 0.3.9

from: https://github.com/jenkins-x-plugins/jx-admin

-----
# jenkins-x-plugins/jx-admin

## Changes in version 0.3.9

### Bug Fixes

* upgrade goreleaser (Mårten Svantesson)

Author: pow-devops2020

pkg/plugins/versions.go

@@ -7,7 +7,7 @@ import (
 
 const (
 	// AdminVersion the version of the jx admin plugin
-	AdminVersion = "0.3.7"
+	AdminVersion = "0.3.9"
 
 	// ApplicationVersion the version of the jx application plugin
 	ApplicationVersion = "0.3.3"