fix return types in CleanTempFiles service

src/Service/Cron/Job/CleanTempFiles.php

@@ -88,7 +88,7 @@ class CleanTempFiles extends BaseCronJob implements CronjobInterface
     /**
      * List the files to delete in the DB
      * @param \DateTime $maxDate
-     * @return Collection<File>
+     * @return array<File>
      * @throws Exception
      */
     protected function listFilesToDelete(\DateTime $maxDate): array
@@ -136,7 +136,7 @@ class CleanTempFiles extends BaseCronJob implements CronjobInterface
      * @param $maxDate
      * @return int
      */
-    protected function purgeFiles(\DateTime $maxDate): int{
+    protected function purgeFiles(\DateTime $maxDate): int {
         $queryBuilder = $this->fileRepository->createQueryBuilder('f');
         $queryBuilder->delete();
         $this->getQueryConditions($queryBuilder, $maxDate);
@@ -146,10 +146,10 @@ class CleanTempFiles extends BaseCronJob implements CronjobInterface
     /**
      * Delete the files
      *
-     * @param Collection<File> $files
+     * @param array<File> $files
      * @return void
      */
-    protected function deleteFiles(Collection $files): void {
+    protected function deleteFiles(array $files): void {
         $total = count($files);
         $this->ui->print($total . " temporary files to be removed");
 
@@ -175,7 +175,7 @@ class CleanTempFiles extends BaseCronJob implements CronjobInterface
      * @param QueryBuilder $queryBuilder
      * @param \DateTime $maxDate
      */
-    protected function getQueryConditions(QueryBuilder $queryBuilder, \DateTime $maxDate): void{
+    protected function getQueryConditions(QueryBuilder $queryBuilder, \DateTime $maxDate): void {
         $queryBuilder
             ->andWhere(
                 $queryBuilder->expr()->orX(