Invalid service "ReCaptcha\ReCaptcha": method "__construct()"

Question

I'm on Symfony 5.4 and I'm trying to make an old tutorial (Symfony4.4)

I need to make a bundle to use Google's ReCaptcha

when I send my form with the valid captcha, I have an error that I do not understand

Invalid service "ReCaptcha\ReCaptcha": method "__construct()" has no argument type-hinted as "ReCaptcha\RequestMethod". Check your service definition.

Codes:

// services.yaml

services:
  recaptcha.type:
      class: Grafikart\RecaptchaBundle\Type\RecaptchaSubmitType
      tags: [ 'form.type' ]
      arguments:
          $key: '%recaptcha.key%'
  recaptcha.validator:
    class: Grafikart\RecaptchaBundle\Constraints\RecaptchaValidator
    tags: ['validator.constraint_validator']
    autowire: true

  ReCaptcha\ReCaptcha:
    class: ReCaptcha\ReCaptcha
    arguments:
      $secret: '%recaptcha.secret%'

      $requestMethod: '@ReCaptcha\RequestMethod:'
      ReCaptcha\RequestMethod: '@ReCaptcha\RequestMethod\CurlPost'
      ReCaptcha\RequestMethod\Curl: ~

// RecaptchaValidator.php

<?php
namespace Grafikart\RecaptchaBundle\Constraints;

use ReCaptcha\ReCaptcha;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;

class RecaptchaValidator extends ConstraintValidator
{
    /**
     * @var RequestStack
     */
    private $requestStack;
    /**
     * @var ReCaptcha
     */
    private $reCaptcha;


    public function __construct(RequestStack $requestStack, ReCaptcha $reCaptcha)
    {

        $this->requestStack = $requestStack;
        $this->reCaptcha = $reCaptcha;
    }

    public function validate($value, Constraint $constraint)
    {
        $request = $this->requestStack->getCurrentRequest();
        $recaptchaResponse = $request->request->get('g-recaptcha-response');
        if (empty($recaptchaResponse)) {
            $this->addViolation($constraint);
        }
        $response = $this->reCaptcha
            ->setExpectedHostname($request->getHost())
            ->verify($recaptchaResponse, $request->getClientIp());
        if (!$response->isSuccess()) {

            $this->addViolation($constraint);
        }
    }

    private function addViolation (Constraint $constraint)
    {
        $this->context->buildViolation($constraint->message)->addViolation();
    }
}

For info, I get the error when I add the last three lines on services.yaml

$requestMethod: '@ReCaptcha\RequestMethod:'
      ReCaptcha\RequestMethod: '@ReCaptcha\RequestMethod\CurlPost'
      ReCaptcha\RequestMethod\Curl: ~

Thank you for your help.