move to ".__NC_ROOT__"

Signed-off-by: Marino Faggiana <marino.faggiana@nextcloud.com>

Author: marinofaggiana

Sources/NextcloudKit/NKCommon.swift

@@ -54,7 +54,7 @@ public struct NKCommon: Sendable {
     public let typeIdentifiers: NKTypeIdentifiers = .shared
 
     // Roor fileName folder
-    public let rootFileName: String = "__NC_ROOT__"
+    public let rootFileName: String = ".__NC_ROOT__"
 
     // Foreground
     public let identifierSessionDownload: String = "com.nextcloud.nextcloudkit.session.download"