fix: event payload if any captcha failed

src/components/CAPTCHA.vue

@@ -69,11 +69,7 @@ watch(
       });
     } else {
       // At least one token is missing
-      emit('captchaVerified', {
+      emit('captchaVerified', null);
-        hCaptchaResponse: null,
-        recaptchaResponse: null,
-        turnstileResponse: null
-      });
     }
   }
 );