Ignoring my first instinct, I tried to imagine some context to this, and if someones linkedin profile says he is in his 30s with a lot of experience, but somehow after applying, they got a cv of a 20 year old with little experience, it put them into a situation where the first impression based on this breaks the trust they try to build with an applicant.
It is probably still not wise to point out the age discrepancy, but i can see how I wouldn't want to work with someone who I only know for 5 seconds but already confused me.
There is a chance, the letter was written by an AI, but equaly can be a corporate template.
If it was a typo, and the difference is only a couple days, tough luck, maybe you should remove the "attention to details" part from your cv. :D
I would love to know your config so I can do the same.