Doc: whitelisted dynamic link blocked

[jmeyo]

Seems your firebase dynamic link is not whitelisting

This is the first link of the main doc, wants to go to https://g.co/recaptcha/v3

It also seems that firebase will be shutdown https://firebase.google.com/docs/dynamic-links/

[victorlazov]

IMO this should be replaced with this: https://www.google.com/recaptcha/admin/create

[karser]

fixed