Fix the GitHub Omniauth instructions
Technically the screenshot is also out of date, but I honestly don't care enough to go through the effort of making a sample application, taking a screenshot, etc.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Technically the screenshot is also out of date, but I honestly don't care enough to go through the effort of making a sample application, taking a screenshot, etc.