message: Update README common PR steps to be more beginner friendly
diff: @@ -27,8 +27,9 @@ The common steps to send a pull request are:
  0. Open or refer to an issue in the [TypeScript repo](https://github.com/Microsoft/TypeScript).
  1. Add missing elements to `inputfiles/addedTypes.json`, overriding elements to `inputfiles/overridingTypes.json`, or elements to remove to `inputfiles/removedTypes.json`.
  -2. Run the script locally to obtain new `dom.generated.d.ts` and `webworker.generated.d.ts`.
  -3. Update the files in the `baselines` folder using the newly generated files.
  +2. Run the build script locally to obtain new `dom.generated.d.ts` and `webworker.generated.d.ts`.
  +3. Update the files in the `baselines` folder using the newly generated files
  + under `generated` folder (`cp ./generated/* ./baseline/`).
  ### When should a DOM API be included here?
  