Update the README to include the current `auth_hash` format
Update the README to include the current `auth_hash` format

So the documentation matches reality.

RadiusNetworks/omniauth-radius-rails,RadiusNetworks/omniauth-radius-rails,juliancheal/omniauth-radius-rails,juliancheal/omniauth-radius-rails,juliancheal/omniauth-radius-rails,RadiusNetworks/omniauth-radius-rails,RadiusNetworks/omniauth-radius-rails