Review plugin features compatibility with Git Plugin 4.x

Description

Branch matching is changed in 4.0 (https://issues.jenkins-ci.org/browse/JENKINS-29603)
So steps described in https://mohamicorp.atlassian.net/wiki/spaces/DOC/pages/209059847/Triggering+Jenkins+on+new+Pull+Requests
stop working properly (at least Pull Request triggering). Fix is required

Environment

None

Assignee

Andrey Levchenko

Reporter

Andrey Levchenko

Labels

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Github URL

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Sprint

None

Priority

Medium
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