I just got a reminder for the new certificate of apple's push notification service. Have you already updated to this new certificate? How to check if my server is compatible with the new certificate?

From what I got in the E-Mail, the certificate that is shown on the sectigo page has to be downloaded. And this is how I did it on my ubuntu server:

curl -o USERTrustRSA.crt ''

Moved to the ca-certificates folder:

cp ./USERTrustRSA.crt /usr/local/share/ca-certificates

Executed the update command to create symlinks & apply the certificates in the folder:

sudo update-ca-certificates

That's it? Do I need to do something else here? Maybe this is the right way of doing it and somebody might use this as a tutorial... :)