[head] Bump matrix plugin

[jkhelil]

No description provided.

[akram]

/lgtm

[openshift-ci-robot]

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[akram]

/cherry-pick release-4.6

[openshift-cherrypick-robot]

@akram: new pull request could not be created: status code 422 not one of [201], body: {"message":"Validation Failed","errors":[{"resource":"PullRequest","code":"custom","message":"No commits between openshift:release-4.6 and openshift-cherrypick-robot:cherry-pick-1125-to-release-4.6"}],"documentation_url":"https://docs.github.com/rest/reference/pulls#create-a-pull-request"}

In response to this:

/cherry-pick release-4.6

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[akram]

I asked ART to bump new plugins version here:
https://issues.redhat.com/browse/ART-2105

[akram]

/retitle [head] Bump matrix plugin