harmonize permissions required for circleci migrator

[jsoref]

Code of Conduct

• [X] I have read and agree to the GitHub Docs project's Code of Conduct

What article on docs.github.com is affected?

https://docs.github.com/en/actions/migrating-to-github-actions/automated-migrations/migrating-from-circleci-with-github-actions-importer#configuring-credentials

What part(s) of the article would you like to see updated?

Create a GitHub personal access token (classic). For more information, see "Managing your personal access tokens."

Your token must have the workflow scope.

After creating the token, copy it and save it in a safe location for later use.

https://docs.github.com/en/actions/migrating-to-github-actions/automated-migrations/migrating-from-circleci-with-github-actions-importer#using-environment-variables

GitHub Actions Importer uses the following environment variables to connect to your CircleCI instance:

GITHUB_ACCESS_TOKEN: The personal access token (classic) used to create pull requests with a converted workflow (requires repo and workflow scopes).

Additional information

It's possible these sections aren't talking about the same thing, but that feels unlikely, and as I've tripped on an error that seems related, it feels like a bug.