Fix acceptance test

[MAILPOET-2787]

assets/js/src/newsletters/send/standard.jsx

@@ -89,6 +89,7 @@ class StandardScheduling extends React.Component {
           disabled={this.props.field.disabled}
           name="isScheduled"
           onCheck={this.handleCheckboxChange}
+          automationId="email-schedule-checkbox"
         />
 
         {schedulingOptions}

tests/acceptance/ScheduleNewsletterCest.php

@@ -23,7 +23,7 @@ class ScheduleNewsletterCest {
     // step 4 - Choose list and schedule
     $i->waitForElement('[data-automation-id="newsletter_send_form"]');
     $i->selectOptionInSelect2($segmentName);
-    $i->checkOption('isScheduled');
+    $i->click('[data-automation-id="email-schedule-checkbox"]');
     $i->click('select[name=time]');
     $i->selectOption('form select[name=time]', '6:00');
     $i->click('Schedule');