Update account/index.ftl for Keycloak v23
Resources from Account v2 theme are no longer copied into common: https://github.com/keycloak/keycloak/pull/24929
Due to an influx of spam, we have had to temporarily disable account registrations. Please write an email to accountsupport@archlinux.org, with your desired username, if you want to get access. Sorry for the inconvenience.
Resources from Account v2 theme are no longer copied into common: https://github.com/keycloak/keycloak/pull/24929