Fix required role level for Jenkins-to-GitHub built status notifications
What does this MR do and why?
Documentation states that CI use must have role "Developer" in project. Unfortunately this does not suffice build status notifications (returns HTTP 403 when calling updateGitlabCommitStatus in Jenkinsfile). Correct role is "Maintainer" as specified in https://github.com/jenkinsci/gitlab-plugin#jenkins-to-gitlab-authentication
Screenshots or screen recordings
If using "Developer" role:
[Pipeline] updateGitlabCommitStatus
Failed to update Gitlab commit status for project 'powerup-technologies/others/jenkins_example': HTTP 403 Forbidden
MR acceptance checklist
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- [y] I have evaluated the MR acceptance checklist for this MR.