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Diana Clarke authored and Sutou Kouhei committed 2585f7c2329
ARROW-11852: [Docs] Update CONTRIBUTING to explain Contributor role Closes #9648 from dianaclarke/ARROW-11852 Authored-by: Diana Clarke <diana.joan.clarke@gmail.com> Signed-off-by: Sutou Kouhei <kou@clear-code.com>