Sync fastapi docs from 50fa3f7c on 2026-01-11

docs_src/header_params/tutorial003_an_py39.py

@@ -1,4 +1,4 @@
-from typing import Annotated, List, Union
+from typing import Annotated, Union
 
 from fastapi import FastAPI, Header
 
@@ -6,5 +6,5 @@ app = FastAPI()
 
 
 @app.get("/items/")
-async def read_items(x_token: Annotated[Union[List[str], None], Header()] = None):
+async def read_items(x_token: Annotated[Union[list[str], None], Header()] = None):
     return {"X-Token values": x_token}