new sig-messaging co-chairs

CentOS Infra issue/request

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Issue Type

• [] Issue - problem with something that was working
• [] Feature Request - something you'd like us to add/modify/change
• [x] Task - mostly used by CentOS Infra team for day-to-day operations or bigger plans

Description

We would like to take over from Matthias https://accounts.centos.org/group/sig-messaging/ . Could you please add @lmiccini and @lemenkov so that we could have the extras-build permission for rpms? cc @mrunge