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

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

zerver/openapi/markdown_extension.py

@@ -9,8 +9,10 @@ import inspect
 import json
 import re
 import shlex
+from collections.abc import Mapping
+from re import Match, Pattern
 from textwrap import dedent
-from typing import Any, Mapping, Match, Pattern
+from typing import Any
 
 import markdown
 from django.conf import settings