Add Tomo Dote to Japanese proofreader
What does this MR do?
I want to be proofreader of gitlab's project. I had translate Gitlab's strings at crowdin for one year or more. and also translated Electron, Phalcon on crowdin and cppcheck on github
Does this MR meet the acceptance criteria?
This MR only change gitlab-ce/doc/development/i18n/proofreader.md