message: misc: Updated CONTRIBUTING.md with correct deploy steps
diff: * [ ] Consider whether any changes warrant additions to these tests
  * [ ] Stop and think "What version number should this be according to SemVer?"
  * [ ] Add an entry to the [History](https://github.com/getsentry/raven-node/blob/master/History.md) file.
  -* [ ] Bump version number in `package.json` using `npm version [patch|minor|major] -m 'release: %s'`.
  +* [ ] Bump version number in `package.json`
  +* [ ] Commit changes `git commit -am "<version>"`
  +* [ ] Create a tag `git tag -a <version> -m "<version>"`
  * [ ] Push to GitHub (`git push origin master --follow-tags`).
  * [ ] Once CI builds pass, `sentry-probot` will publish a release on npm and GitHub.
  