fix newsletter single exporter syntax error - resolves #153

Author: dvesh3

src/Newsletter/ProviderHandler/Mailchimp/CustomerExporter/SingleExporter.php

@@ -165,7 +165,7 @@ public function fetchCustomer(Mailchimp $mailchimpProviderHandler, MailchimpAwar
 
 
         $result = $apiClient->get(
-            $exportService->getListResourceUrl($mailchimpProviderHandler->getListId(), sprintf('members/%s', $remoteId)),
+            $exportService->getListResourceUrl($mailchimpProviderHandler->getListId(), sprintf('members/%s', $remoteId))
         );
 
         if(!$apiClient->success()) {