ruff: Fix UP035 Import from collections.abc, typing instead.

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

zerver/tests/test_invite.py

@@ -1,6 +1,7 @@
 import re
+from collections.abc import Sequence
 from datetime import datetime, timedelta
-from typing import TYPE_CHECKING, Sequence
+from typing import TYPE_CHECKING
 from unittest.mock import patch
 from urllib.parse import quote, urlencode