message: Adjust headers.
diff: <p>A tribute and log of beloved products and services killed by Google.</p>
  </div>
  -# Contributing Guide
  +## Contributing Guide
  -## Pull Request
  +### Pull Request
  If you are altering anything other than `graveyard.json`, you should ensure that your Pull Request will pass continuous integration. Run `yarn test` which will perform these three actions:
  @@ -16,5 +16,5 @@ If you are altering anything other than `graveyard.json`, you should ensure that
  There is currently no continuous delivery running on this project, so **commit the production build** that results from any changes you make to the codebase.
  -## Continuous Integration
  +### Continuous Integration
  Every PR must pass CI checks before it can be updated or merged into production.
  