test: fix share storage move test with object store

Signed-off-by: Robin Appelman <robin@icewind.nl>

apps/files_sharing/tests/SharedStorageTest.php

@@ -451,6 +451,7 @@ public function testMoveFromStorage(): void {
 
 		$sourceStorage = new \OC\Files\Storage\Temporary([]);
 		$sourceStorage->file_put_contents('foo.txt', 'asd');
+		$sourceStorage->getScanner()->scan('');
 
 		$sharedStorage->moveFromStorage($sourceStorage, 'foo.txt', 'bar.txt');
 		$this->assertTrue($sharedStorage->file_exists('bar.txt'));