fix: add json decode error import (#205)

Author: Andrew Smith

storage3/_async/file_api.py

@@ -3,6 +3,7 @@
 import urllib.parse
 from dataclasses import dataclass, field
 from io import BufferedReader, FileIO
+from json import JSONDecodeError
 from pathlib import Path
 from typing import Any, Literal, Optional, Union, cast
 

storage3/_sync/file_api.py

@@ -3,6 +3,7 @@
 import urllib.parse
 from dataclasses import dataclass, field
 from io import BufferedReader, FileIO
+from json import JSONDecodeError
 from pathlib import Path
 from typing import Any, Literal, Optional, Union, cast