This is a legitimate email from ebay. It likely said 'its been a year since you updated your personal info'. I had one recently. I also had a notification saying the same in the notifications tab/button when logged into the site.
They just want you to check your address/contact details are correct, also worth considering refreshing your password incase you have used it elsewhere which may have been compromised in any leaks a lot of places suffer.
(They prob also hope you will add more info like more phone numbers dates of birth etc which helps them build a profile on you, thats up to you if you want to give more than the minimum required.)
But!
As always with these things, official emails are only ever notifications of action needed, and you dont/shouldnt need to click any link in the email to do any action.
Instead you make your own way to the site/app in question and check the notifications there to do any actions required.