whats the command to change char name

Diablo 2 characters can be renamed (cool down of 7 days unless the character is from asia2/asia3) by logging into chat with your diablo 2 character and using command /rename-character and then using the verification via link sent via email

That's a direct quote from Mark Chandler:
https://us.battle.net/forums/en/bnet/topic/20765158054

Should add quotations