Merge pull request #44916 from nextcloud/followup/44910/share-date-time

fix(sharing): Don't change the type of the controller argument

apps/files_sharing/lib/Controller/ShareAPIController.php

 		//Expire date
 		if ($expireDate !== '') {
 			try {
-				$expireDate = $this->parseDate($expireDate);
-				$share->setExpirationDate($expireDate);
+				$expireDateTime = $this->parseDate($expireDate);
+				$share->setExpirationDate($expireDateTime);
 			} catch (\Exception $e) {
 				throw new OCSNotFoundException($this->l->t('Invalid date, date format must be YYYY-MM-DD'));
 			}