tree cf56cd6ce56830ce4dc32c3f08864b70bfb36f01
parent 764a9d16a64a5b5b2cf2f267e376e4c17ffe4612
author Joe Tsai <joetsai@digital-static.net> 1582579824 -0800
committer Joe Tsai <joetsai@google.com> 1582582507 +0000

all: update contributing documentation

Change-Id: I2815e570696fd5ffc765c42ffc26060fc4aa5a2b
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/220677
Reviewed-by: Damien Neil <dneil@google.com>