use typing_extensions.TypedDict to satisfy pydantic

pyproject.toml

@@ -38,6 +38,8 @@ dependencies = [
     "twiggy",
     # We rely on deprecated features to maintain compat btw. pydantic v1 and v2
     "pydantic < 3",
+    # pydantic already pulls it in, but we use it for TypedDict
+    "typing_extensions",
     # Used for sending announcements
     "pyperclip",
 ]

src/antsibull/announcements.py

@@ -18,7 +18,7 @@
 from functools import lru_cache, partial
 from pathlib import Path
 from textwrap import dedent
-from typing import TYPE_CHECKING, TypedDict
+from typing import TYPE_CHECKING
 from urllib.parse import quote as url_quote
 from urllib.parse import urlencode, urljoin
 
@@ -29,6 +29,7 @@
 from antsibull_core.dependency_files import DependencyFileData, DepsFile
 from jinja2 import Environment, PackageLoader, StrictUndefined, select_autoescape
 from packaging.version import Version as PypiVer
+from typing_extensions import TypedDict
 
 from antsibull.constants import ANSIBLE_FORUM_URL, BUILD_DATA_URL
 from antsibull.pypi import PyPIClient, SdistAndWheelPair, UrlInfo