Miss spelling of the `converBranch` func within the gitlab driver webhook pkg.

[iamjohnnym]

Issue

func converBranch appears to defy convention by missing the t. Looking at other packages, it looks like the convention and expect namespace should be convertBranch.

Reference

• https://github.com/jenkins-x/go-scm/blob/main/scm/driver/gitlab/webhook.go#L191