@hideki That's probably from Google Chrome's password manager. I got the same email the other day as well for some passwords I have saved from about a decade ago.
These days I use the pass password manage: https://www.passwordstore.org/
@hideki Look at the details of what accounts they're actually warning you about. But yeah, good chance you have nothing to worry about. I didn't.
@pete then i don't know if i should be concerned, i haven't used chrome since ages and i have changed passwords at least two times since then.