project.config: grant mdb/golang-gob-branchers branch creation

Change-Id: Ib4e73afbbaeaa805baa015c656f514adefb122a3
Reviewed-on: https://go-review.googlesource.com/c/All-Projects/+/456955
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2 files changed
tree: 2352946e7e9da6946ffd87240b5af55153f8bf56
  1. groups
  2. project.config