message: build: tweak release note file default name
diff: const version = process.argv[2] || process.env.VERSION
  const cc = require('conventional-changelog')
  -const file = `./RELEASE_NOTE_${version}.md`
  +const file = `./RELEASE_NOTE${version ? `_${version}` : ``}.md`
  const fileStream = require('fs').createWriteStream(file)
  cc({
  