requirements: Upgrade Django to 4.1.

zerver/migrations/0240_usermessage_migrate_bigint_id_into_id.py needs
to be updated to account for Django 4.1 creating AutoField as an
identity column rather than a serial column.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

zerver/middleware.py

@@ -479,7 +479,7 @@ class JsonErrorHandler(MiddlewareMixin):
                     request.path,
                     response=response,
                     request=request,
-                    exc_info=True,
+                    exception=exception,
                 )
             return response
         if RequestNotes.get_notes(request).error_format == "JSON" and not settings.TEST_SUITE: