build docs for python<3.12 (#841)

Author: samuelcolvin

docs/.hooks/algolia.py

@@ -4,9 +4,10 @@
 import os
 import sys
 from pathlib import Path
-from typing import TYPE_CHECKING, TypedDict, cast
+from typing import TYPE_CHECKING, cast
 
 from pydantic import TypeAdapter
+from typing_extensions import TypedDict
 
 if TYPE_CHECKING:
     from mkdocs.config import Config