Revise section about granting permissions
Revise section about granting permissions

This clarifies that the section is relevant before running the app
locally. I've removed the part about setting the "app_name" in the
Publishing API, since as far as I can see:

- This field is (no longer?) used for anything.
- Any app can talk to the Publishing API in dev mode.

alphagov/specialist-publisher,alphagov/specialist-publisher,alphagov/specialist-publisher