locale: update development.md (#1003)
locale: update development.md (#1003)

development.md is updated to mention core-validate-commit as a useful
tool in validating commit messages
Fixes: https://github.com/nodejs/node/issues/9328
nodejs/new.nodejs.org,yous/new.nodejs.org,phillipj/new.nodejs.org,yous/new.nodejs.org,nodejs/new.nodejs.org,phillipj/new.nodejs.org