Update type hints

openlibrary/core/models.py

@@ -6,7 +6,7 @@
 from collections import defaultdict
 from dataclasses import dataclass, field
 from datetime import datetime, timedelta
-from typing import Any, TypedDict
+from typing import Any, Self, TypedDict
 from urllib.parse import urlencode
 
 import requests
@@ -1159,7 +1159,7 @@ def create(
         tag,
         ip='127.0.0.1',
         comment='New Tag',
-    ):
+    ) -> Self:
         """Creates a new Tag object."""
         current_user = web.ctx.site.get_user()
         patron = current_user.get_username() if current_user else 'ImportBot'