Reset your email password. It’s saying that your email is being sold

No, it’s just saying they found whatever the email is along with a password in some dark web database.

The dumb part is that they don’t tell you any of the email address in the alert.

Was that alert sent as an email?

Why would they tell you your email in an email sent directly to you? No, scratch that. Why would they censor your email in an email sent directly to you?