Fix: Changes for > PHP 8

Author: modelrailroader

docs/qr-codes.md

@@ -50,14 +50,12 @@ If you do not want to use the default QR code provider, you can specify the one
 use RobThree\Auth\TwoFactorAuth;
 use RobThree\Auth\Algorithm;
 
-$qrCodeProvider = new YourChosenProvider();
-
 $tfa = new TwoFactorAuth(
 	null,
 	6,
 	30,
 	Algorithm::Sha1,
-	$qrCodeProvider
+	YourChosenProvider: $qrCodeProvider
 );
 ```