Unfortunately, you cannot change your character’s name in Diablo 4 once you have created it. If you get bored with your current character’s name and don’t want to see it anymore, you will need to create a new one with the desired name (you can have up to 10 characters at the same time).
Name changes are not available in Diablo 4 at the moment, but this could change in the future if Blizzard decides to add this feature.
