fixed KillCharacter help command description typo case

src/main/java/emu/grasscutter/command/commands/KillCharacterCommand.java

@@ -13,7 +13,7 @@ import java.util.List;
 
 import static emu.grasscutter.utils.Language.translate;
 
-@Command(label = "killcharacter", usage = "killcharacter", aliases = {"suicide", "kill"}, permission = "player.killcharacter", permissionTargeted = "player.killcharacter.others", description = "commands.killcharacter.description")
+@Command(label = "killcharacter", usage = "killcharacter", aliases = {"suicide", "kill"}, permission = "player.killcharacter", permissionTargeted = "player.killcharacter.others", description = "commands.killCharacter.description")
 public final class KillCharacterCommand implements CommandHandler {
 
     @Override