Adds a step to configure the publish scope.

[radfahrer]

Why:

There is a missing step.
Closes #7298

What's being changed:

Adds missing step.

Check off the following:

• I have reviewed my changes in staging (look for the deploy-to-heroku link in your pull request, then click View deployment).
• For content changes, I have completed the self-review checklist.

Writer impact (This section is for GitHub staff members only):

• This pull request impacts the contribution experience
  • I have added the 'writer impact' label
  • I have added a description and/or a video demo of the changes below (e.g. a "before and after video")

[welcome]

Thanks for opening this pull request! A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[janiceilene]

@radfahrer Thanks so much for opening a PR! I'll get this triaged for review 💖

[felicitymay]

Thank you for spotting this omission from the quickstart guide and adding instructions for how to fix it. 💖

I'm a packages novice and tried the quick start guide with and without your step. I would have been baffled about how to fix this on my own. With your changes I was able to work it out 🙂

[felicitymay]

Apologies for the delay in getting to your review, it's been a busy time. I'm going to check that my text changes look okay on staging when it finishes deploying: https://docs-7299--patch-2.herokuapp.com/en/packages/quickstart. As long as I haven't introduced any bugs, I'll update the branch from main and merge your changes.

Thank you so much for taking the time to raise this PR to fix this omission in the quickstart ✨

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