fix default value

Author: giancarloromeo

packages/models-library/src/models_library/api_schemas_storage.py

@@ -236,7 +236,7 @@ def ensure_location_is_integer(cls, v):
 
 
 class FileMetaDataArray(RootModel[list[FileMetaDataGet]]):
-    root: list[FileMetaDataGet] = []
+    root: list[FileMetaDataGet] = Field(default_factory=list)
 
 
 # /locations/{location_id}/files/{file_id}