It’s not your domain but the pattern for the Stape custom loader that was added to Ublock rules.
So changing it likely won’t do you any good.
If you have to, on Business and higher plans you just add a new domain (with DNS records ofc), change that inside your GTM and then remove the old one. On lower plans you’ll have to remove existing domain and add a new one from scratch.
We have some internal processes that send data to our current domain. If we update the DNS record to make the current domain an alias of a newly added domain for the container, will that mean we won’t need to make any changes in that code?
UPDATE: I don’t think this is as simple as I hoped. I saw in GTM that you can add additional URLs to the container: