Fix import of `Annotated` in `settings.app03`

docs_src/settings/app03_an/main.py

@@ -1,7 +1,7 @@
 from functools import lru_cache
-from typing import Annotated
 
 from fastapi import Depends, FastAPI
+from typing_extensions import Annotated
 
 from . import config
 

docs_src/settings/app03_an_py39/main.py

@@ -1,7 +1,7 @@
 from functools import lru_cache
+from typing import Annotated
 
 from fastapi import Depends, FastAPI
-from typing_extensions import Annotated
 
 from . import config