[doc]update_auth0_link
The link to the Auth0 documentation is broken ->  (could not find one that is current on Auth0)
@@ -57,6 +57,5 @@ Need help? Contact [Datadog support][1].
[1]: https://docs.datadoghq.com/help
[2]: https://manage.auth0.com
-[3]: https://auth0.com/docs/logs/streams/datadog
[4]: https://app.datadoghq.com/account/settings#api
[5]: https://auth0.com/docs/logs/references/log-event-type-codes
