[BUGFIX] use correct FlexFormService in FlexFormProcessor

Author: dmh

Classes/DataProcessing/FlexFormProcessor.php

@@ -14,7 +14,7 @@
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-use TYPO3\CMS\Extbase\Service\FlexFormService;
+use TYPO3\CMS\Core\Service\FlexFormService;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
 use TYPO3\CMS\Frontend\ContentObject\DataProcessorInterface;