chore: Assert rename success in versionning tests

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

Author: come-nc

apps/files_versions/tests/VersioningTest.php

@@ -425,8 +425,9 @@ public function testMoveFileIntoSharedFolderAsRecipient(): void {
 		$this->rootView->file_put_contents($v2, 'version2');
 
 		// move file into the shared folder as recipient
-		Filesystem::rename('/test.txt', '/folder1/test.txt');
+		$success = Filesystem::rename('/test.txt', '/folder1/test.txt');
 
+		$this->assertTrue($success);
 		$this->assertFalse($this->rootView->file_exists($v1));
 		$this->assertFalse($this->rootView->file_exists($v2));