updated localstore collection to global constant

lib/api/marianumcloud/webdav/queries/listFiles/listFilesCache.dart

@@ -12,7 +12,7 @@ class ListFilesCache extends RequestCache<ListFilesResponse> {
   ListFilesCache({required onUpdate, required this.path}) : super(RequestCache.cacheNothing, onUpdate) {
     var bytes = utf8.encode('MarianumMobile-$path');
     var cacheName = md5.convert(bytes).toString();
-    start('MarianumMobile', 'wd-folder-$cacheName');
+    start('wd-folder-$cacheName');
   }
 
   @override