Docs misleading on pull requests

[stucka]

The docs say to make a fork, work on it, then submit a pull request.

All such pull requests will fail automated CI testing, as there are some built-in project-level tests that require a BLN API key for testing, and forks do not have access to the environment variable / Github secret needed to pass those tests. One approach is to take a copy of the original repo; create a branch; and bring in the files from the branch for testing.

See https://github.com/biglocalnews/bln-python-client/settings/secrets/actions

Anyone with collaborator access to this repository can use these secrets and variables for actions. They are not passed to workflows that are triggered by a pull request from a fork.