Changing default throttle interval to hour

x-pack/plugins/triggers_actions_ui/public/application/sections/alert_form/alert_form.tsx

@@ -167,7 +167,7 @@ export const AlertForm = ({
  alert.throttle ? getDurationNumberInItsUnit(alert.throttle) : null
  );
  const [alertThrottleUnit, setAlertThrottleUnit] = useState<string>(
- alert.throttle ? getDurationUnitValue(alert.throttle) : 'm'
+ alert.throttle ? getDurationUnitValue(alert.throttle) : 'h'
  );
  const [defaultActionGroupId, setDefaultActionGroupId] = useState<string | undefined>(undefined);
  const [alertTypesIndex, setAlertTypesIndex] = useState<AlertTypeIndex | null>(null);