Which address or domain name is requested for the update that comes with AdGuardHome?

[DustinWin]

After the router (ARMv8) installs AdGuardHome, which address or domain name is requested to use the built-in update?
I am using the solution of ShellClash (fake-ip mode) with AdGuardHome, with AdGuardHome as downstream. So AdGuardHome will receive fake IPs, but I have added the blacklist download address adguardteam.github.io to ShellClash's fake-ip-filter list, so checking to update the blacklist will not report an error. But every 12 minutes or so, this error message will pop up in the lower right corner of the AdGuardHome management page:

[DustinWin]

I found it, checked the AdGuardHome control panel through the developer tools (Chrome), and found the requested domain name, which is static.adtidy.org.