Don't click, and send it on to yahoo to whatever department they have to report spoof or phishing emails.
You probably got one of those, ebay and paypal are constantly being used in this way, these emails keep getting sent out in their names, and telling you to click on the link to update. I send at least 2 or 3 a week on to them, they're always fraudulent.
Don't click it, and forward on the email, they'll reply to you pretty quickly to let you know if it's fake or not.
Thanks. I was going to do that but couldn't find an address to mail it too. You'd think it would be yahoo@yahoo.com! LOL