(command+output provided) Let's Encrypt certificate expiration notice for domain "www.XXXX.com"

They look good to me.
Ensure that you are using those certs and you should be fine.
If you [re]read the email sent.
You may better understand why you have received it.
[and how to check what certs have been issued]

Pay close attention to where it says something about/roughly like "if a name was added or removed it is considered to be another cert".

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