Merge pull request #48034 from nextcloud/backport/48016/stable29

[stable29] fix(S3ConfigTrait): Allow proxy field to take false

Author: skjnldsv

lib/private/Files/ObjectStore/S3ConfigTrait.php

@@ -39,7 +39,7 @@ trait S3ConfigTrait {
 
 	protected int $timeout;
 
-	protected string $proxy;
+	protected string|false $proxy;
 
 	protected string $storageClass;