Merge pull request #169 from magento/sdzhepa-fix-issue-168

Fix issue #168

Author: naydav

ReCaptchaValidation/Model/ValidationConfig.php

@@ -45,7 +45,7 @@ public function __construct(
         string $privateKey,
         string $remoteIp,
         string $validationFailureMessage,
-        ?ValidationConfigExtensionInterface $extensionAttributes
+        ValidationConfigExtensionInterface $extensionAttributes = null
     ) {
         $this->privateKey = $privateKey;
         $this->remoteIp = $remoteIp;