Added link to default login url docs (#8631)
Added link to default login url docs (#8631)

User was confused because it wasn't explicitly called out what default login route is how to define it https://community.auth0.com/t/reset-password-success-screen-is-a-dead-end/35967/6?u=ashish
jeffreylees/docs,auth0/docs,auth0/docs,auth0/docs,jeffreylees/docs,jeffreylees/docs