Fix routes on API documentation for Account Authentication Services

The [Account Authentication Services API documentation](https://canvas.instructure.com/doc/api/account_authentication_services.html) reflects CURL command examples that use "/api/v1/account/" as the prefix, which results in failure when testing the API using these example commands due to a "No route found" error.

Updates the documentation for AccountAuthorizationConfigsController, and one example in the OutcomeGroupsApiController.