I started to feel unsafe with this link and my IT team will block it. I have subscribed to Standard plan but email send to us like this not same as before!
Don't worry. The link is legit. The am.atlassian.com domain mostly sends notifications about your Atlassian ID and things happening around it(Email changes, when you've been made an admin of an org). You can look at the email header; everything should be in order. :)