Misleading interface of `signPersonalMessage()` method

[refi93]

Looks like the sdk internally expects an utf-8 string despite the respective parameter being called messageHex. Could you please adjust the docstring/parameter name to match reality and avoid confusion?

keystone-sdk-usb/packages/hw-app-eth/src/new.ts

Lines 170 to 180 in 1dd504a

	* @param path - The derivation path for the private key used to sign the message.
	* @param messageHex - A hexadecimal string that represents the message to be signed.
	* @return A Promise that resolves to an object with properties:
	* - r: A string representing the "r" value of the signature.
	* - s: A string representing the "s" value of the signature.
	* - v: A string representing the "v" value of the signature.
	*/
	async signPersonalMessage(path: string, messageHex: string): Promise<{ r: string, s: string, v: string }> {
	const messageBuffer = Buffer.from(messageHex, 'utf-8');
	return this.sign(path, messageBuffer, DataType.personalMessage);
	}