chore: psalm fixes

Signed-off-by: Robin Appelman <[email protected]>

Author: icewind1991

lib/Mount/GroupFolderStorage.php

@@ -23,7 +23,7 @@ class GroupFolderStorage extends Quota implements IConstructableStorage {
 	private ?ICacheEntry $rootEntry;
 	private IUserSession $userSession;
 	private ?IUser $mountOwner;
-	/** @var RootEntryCache|null */
+	/** @var ICache|null */
 	public $cache;
 
 	public function __construct($parameters) {

lib/Mount/MountProvider.php

@@ -229,7 +229,7 @@ public function getTrashMount(
 
 		$storage = $this->getRootFolder()->getStorage();
 
-		$storage->setOwner($user?->getUID());
+		$storage->setOwner($user->getUID());
 
 		$trashPath = $this->getRootFolder()->getInternalPath() . '/trash/' . $id;