That Community-scripts seems to come off as some sort of Proxmox association, but I can’t see anything official. Maybe Tteck is endorsing it, but it’s not clear either.

Keep in mind that running scripts, especially curl-bash pipes, has a huge security risk as anything can be substituted in the scripts or the dependencies they call. No clue who MickLesk is and not saying they’re good, bad or indifferent. But there is no reputation there and caution should be exercised.