Yes, they have now changed their Telegram username. This is shown in the screenshots I provided as evidence. The previous Telegram username matches the username listed on their Patched profile.
https://imgur.com/a/9aTdRqW
https://imgur.com/a/w3GlFI5
https://imgur.com/a/9aTdRqW
https://imgur.com/a/w3GlFI5