The Knicks won their first title in 53 years, so Madison Square Garden emailed its workers a free championship ring. Anyone who clicked to pick their design found out the ring was fake. They'd failed a company phishing test, and now they had to go sit through a mandatory cybersecurity class. And according to The Athletic, a lot of longtime Garden employees were never getting a real ring in the first place. To be fair to MSG, they do have a real hacking problem. Back in June a group called…